21054026232 has 72 divisors (see below), whose sum is σ = 58604364000. Its totient is φ = 6828300864.

The previous prime is 21054026221. The next prime is 21054026239. The reversal of 21054026232 is 23262045012.

It is a happy number.

21054026232 is a `hidden beast` number, since 21 + 0 + 5 + 402 + 6 + 232 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a junction number, because it is equal to n+sod(n) for n = 21054026196 and 21054026205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21054026239) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8232 + ... + 205367.

It is an arithmetic number, because the mean of its divisors is an integer number (813949500).

Almost surely, 2^21054026232 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 21054026232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29302182000).

21054026232 is an abundant number, since it is smaller than the sum of its proper divisors (37550337768).

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

21054026232 is a wasteful number, since it uses less digits than its factorization.

21054026232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213685 (or 213641 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The spelling of 21054026232 in words is "twenty-one billion, fifty-four million, twenty-six thousand, two hundred thirty-two".