21152211156432 has 160 divisors (see below), whose sum is σ = 62179427761920. Its totient is φ = 6882603840000.

The previous prime is 21152211156413. The next prime is 21152211156457. The reversal of 21152211156432 is 23465111225112.

21152211156432 is a `hidden beast` number, since 2 + 1 + 1 + 5 + 2 + 2 + 1 + 1 + 1 + 5 + 643 + 2 = 666.

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

It is a congruent number.

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, 316119 + ... + 6511862.

It is an arithmetic number, because the mean of its divisors is an integer number (388621423512).

Almost surely, 2^{21152211156432} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21152211156432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31089713880960).

21152211156432 is an abundant number, since it is smaller than the sum of its proper divisors (41027216605488).

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

21152211156432 is a wasteful number, since it uses less digits than its factorization.

21152211156432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6828170 (or 6828158 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The spelling of 21152211156432 in words is "twenty-one trillion, one hundred fifty-two billion, two hundred eleven million, one hundred fifty-six thousand, four hundred thirty-two".