21179306052 has 36 divisors (see below), whose sum is σ = 53945267376. Its totient is φ = 7005875760.

The previous prime is 21179306021. The next prime is 21179306063. The reversal of 21179306052 is 25060397112.

21179306052 is a `hidden beast` number, since 2 + 1 + 17 + 9 + 30 + 605 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 21179305998 and 21179306016.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2240758 + ... + 2250189.

Almost surely, 2^21179306052 is an apocalyptic number.

It is an amenable number.

21179306052 is an abundant number, since it is smaller than the sum of its proper divisors (32765961324).

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

21179306052 is a wasteful number, since it uses less digits than its factorization.

21179306052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491088 (or 4491083 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The spelling of 21179306052 in words is "twenty-one billion, one hundred seventy-nine million, three hundred six thousand, fifty-two".