21230557356032 has 56 divisors (see below), whose sum is σ = 43056531638352. Its totient is φ = 10465767424000.

The previous prime is 21230557356017. The next prime is 21230557356061. The reversal of 21230557356032 is 23065375503212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17669219 + ... + 18832482.

Almost surely, 2^{21230557356032} is an apocalyptic number.

It is an amenable number.

21230557356032 is an abundant number, since it is smaller than the sum of its proper divisors (21825974282320).

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

21230557356032 is an frugal number, since it uses more digits than its factorization.

21230557356032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36501798 (or 36501774 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 44.

The spelling of 21230557356032 in words is "twenty-one trillion, two hundred thirty billion, five hundred fifty-seven million, three hundred fifty-six thousand, thirty-two".