21304675918 has 32 divisors (see below), whose sum is σ = 33374592000. Its totient is φ = 10193295840.

The previous prime is 21304675883. The next prime is 21304675921. The reversal of 21304675918 is 81957640312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 645768 + ... + 677956.

It is an arithmetic number, because the mean of its divisors is an integer number (1042956000).

It is a 1-persistent number, because it is pandigital, but 2⋅21304675918 = 42609351836 is not.

Almost surely, 2^21304675918 is an apocalyptic number.

21304675918 is a deficient number, since it is larger than the sum of its proper divisors (12069916082).

21304675918 is a wasteful number, since it uses less digits than its factorization.

21304675918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32400.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 21304675918 in words is "twenty-one billion, three hundred four million, six hundred seventy-five thousand, nine hundred eighteen".