21231836550360 has 1024 divisors, whose sum is σ = 77906888640000. Its totient is φ = 5129787801600.

The previous prime is 21231836550359. The next prime is 21231836550367. The reversal of 21231836550360 is 6305563813212.

21231836550360 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 1 + 8 + 36 + 550 + 3 + 60 = 666.

It is a super-2 number, since 2×21231836550360² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231836550367) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 4228604650 + ... + 4228609670.

Almost surely, 2^{21231836550360} is an apocalyptic number.

21231836550360 is a gapful number since it is divisible by the number (20) 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 21231836550360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38953444320000).

21231836550360 is an abundant number, since it is smaller than the sum of its proper divisors (56675052089640).

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

21231836550360 is a wasteful number, since it uses less digits than its factorization.

21231836550360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5237 (or 5227 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 21231836550360 in words is "twenty-one trillion, two hundred thirty-one billion, eight hundred thirty-six million, five hundred fifty thousand, three hundred sixty".