21054305232 has 120 divisors (see below), whose sum is σ = 62077797600. Its totient is φ = 6642964224.

The previous prime is 21054305183. The next prime is 21054305257. The reversal of 21054305232 is 23250345012.

It is a happy number.

21054305232 is a `hidden beast` number, since 2 + 105 + 4 + 30 + 523 + 2 = 666.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 21054305196 and 21054305205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4054894 + ... + 4060082.

It is an arithmetic number, because the mean of its divisors is an integer number (517314980).

Almost surely, 2^21054305232 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 21054305232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31038898800).

21054305232 is an abundant number, since it is smaller than the sum of its proper divisors (41023492368).

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

21054305232 is a wasteful number, since it uses less digits than its factorization.

21054305232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6705 (or 6696 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The spelling of 21054305232 in words is "twenty-one billion, fifty-four million, three hundred five thousand, two hundred thirty-two".