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21063136248 = 233271131122557
BaseRepresentation
bin10011100111011101…
…011111001111111000
32000100221000012000100
4103213131133033320
5321114130324443
613402024035400
71343651463330
oct234735371770
960327005010
1021063136248
118a29656020
1240ba002b60
131ca8a1c43b
14103b58a0c0
1583426e3d3
hex4e775f3f8

21063136248 has 192 divisors, whose sum is σ = 73417144320. Its totient is φ = 5294419200.

The previous prime is 21063136243. The next prime is 21063136273. The reversal of 21063136248 is 84263136012.

21063136248 is a `hidden beast` number, since 2 + 10 + 6 + 3 + 13 + 624 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21063136243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 110586 + ... + 233142.

It is an arithmetic number, because the mean of its divisors is an integer number (382380960).

Almost surely, 221063136248 is an apocalyptic number.

21063136248 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21063136248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36708572160).

21063136248 is an abundant number, since it is smaller than the sum of its proper divisors (52354008072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21063136248 is a wasteful number, since it uses less digits than its factorization.

21063136248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122618 (or 122611 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 21063136248 in words is "twenty-one billion, sixty-three million, one hundred thirty-six thousand, two hundred forty-eight".