21131930004 has 48 divisors (see below), whose sum is σ = 50529201408. Its totient is φ = 6870521728.

The previous prime is 21131929993. The next prime is 21131930069. The reversal of 21131930004 is 40003913112.

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, 101314 + ... + 229190.

It is an arithmetic number, because the mean of its divisors is an integer number (1052691696).

Almost surely, 2^21131930004 is an apocalyptic number.

It is an amenable number.

21131930004 is an abundant number, since it is smaller than the sum of its proper divisors (29397271404).

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

21131930004 is a wasteful number, since it uses less digits than its factorization.

21131930004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128224 (or 128222 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The spelling of 21131930004 in words is "twenty-one billion, one hundred thirty-one million, nine hundred thirty thousand, four".