21304542132 has 48 divisors (see below), whose sum is σ = 56726819520. Its totient is φ = 6909579936.

The previous prime is 21304542121. The next prime is 21304542163. The reversal of 21304542132 is 23124540312.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21304542096 and 21304542105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2661738 + ... + 2669729.

It is an arithmetic number, because the mean of its divisors is an integer number (1181808740).

Almost surely, 2^21304542132 is an apocalyptic number.

It is an amenable number.

21304542132 is an abundant number, since it is smaller than the sum of its proper divisors (35422277388).

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

21304542132 is a wasteful number, since it uses less digits than its factorization.

21304542132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5331517 (or 5331509 counting only the distinct ones).

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

The spelling of 21304542132 in words is "twenty-one billion, three hundred four million, five hundred forty-two thousand, one hundred thirty-two".