21605357233032 has 16 divisors (see below), whose sum is σ = 54013393082640. Its totient is φ = 7201785744336.

The previous prime is 21605357233003. The next prime is 21605357233037. The reversal of 21605357233032 is 23033275350612.

It is a super-2 number, since 2×21605357233032² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21605357233037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450111608998 + ... + 450111609045.

It is an arithmetic number, because the mean of its divisors is an integer number (3375837067665).

Almost surely, 2^{21605357233032} is an apocalyptic number.

It is an amenable number.

21605357233032 is an abundant number, since it is smaller than the sum of its proper divisors (32408035849608).

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

21605357233032 is a wasteful number, since it uses less digits than its factorization.

21605357233032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900223218052 (or 900223218048 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 42.

The spelling of 21605357233032 in words is "twenty-one trillion, six hundred five billion, three hundred fifty-seven million, two hundred thirty-three thousand, thirty-two".