21115654325032 has 128 divisors (see below), whose sum is σ = 42611886720000. Its totient is φ = 9789171065856.

The previous prime is 21115654324991. The next prime is 21115654325137. The reversal of 21115654325032 is 23052345651112.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3328966453 + ... + 3328972795.

It is an arithmetic number, because the mean of its divisors is an integer number (332905365000).

Almost surely, 2^{21115654325032} is an apocalyptic number.

It is an amenable number.

21115654325032 is an abundant number, since it is smaller than the sum of its proper divisors (21496232394968).

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

21115654325032 is a wasteful number, since it uses less digits than its factorization.

21115654325032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11403 (or 11399 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

Adding to 21115654325032 its reverse (23052345651112), we get a palindrome (44167999976144).

The spelling of 21115654325032 in words is "twenty-one trillion, one hundred fifteen billion, six hundred fifty-four million, three hundred twenty-five thousand, thirty-two".