21150215336052 has 144 divisors (see below), whose sum is σ = 58406347883520. Its totient is φ = 6400038139200.

The previous prime is 21150215336051. The next prime is 21150215336053. The reversal of 21150215336052 is 25063351205112.

21150215336052 is a `hidden beast` number, since 2 + 1 + 1 + 5 + 0 + 2 + 15 + 33 + 605 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (21150215336051) and next prime (21150215336053).

It is a super-2 number, since 2×21150215336052² (a number of 27 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 21150215335998 and 21150215336016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150215336051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1026151227 + ... + 1026171837.

It is an arithmetic number, because the mean of its divisors is an integer number (405599638080).

Almost surely, 2^{21150215336052} is an apocalyptic number.

21150215336052 is a gapful number since it is divisible by the number (22) 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 21150215336052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29203173941760).

21150215336052 is an abundant number, since it is smaller than the sum of its proper divisors (37256132547468).

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

21150215336052 is a wasteful number, since it uses less digits than its factorization.

21150215336052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24194 (or 24189 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 21150215336052 in words is "twenty-one trillion, one hundred fifty billion, two hundred fifteen million, three hundred thirty-six thousand, fifty-two".