21038580204 has 24 divisors (see below), whose sum is σ = 49257571440. Its totient is φ = 6988924224.

The previous prime is 21038580193. The next prime is 21038580229. The reversal of 21038580204 is 40208583012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2988319 + ... + 2995350.

It is an arithmetic number, because the mean of its divisors is an integer number (2052398810).

Almost surely, 2^21038580204 is an apocalyptic number.

It is an amenable number.

21038580204 is an abundant number, since it is smaller than the sum of its proper divisors (28218991236).

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

21038580204 is a wasteful number, since it uses less digits than its factorization.

21038580204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5983969 (or 5983967 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The spelling of 21038580204 in words is "twenty-one billion, thirty-eight million, five hundred eighty thousand, two hundred four".