21709814104 has 32 divisors (see below), whose sum is σ = 45838909440. Its totient is φ = 9549770400.

The previous prime is 21709814099. The next prime is 21709814153. The reversal of 21709814104 is 40141890712.

It is a congruent number.

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, 3976344 + ... + 3981799.

It is an arithmetic number, because the mean of its divisors is an integer number (1432465920).

Almost surely, 2^21709814104 is an apocalyptic number.

It is an amenable number.

21709814104 is an abundant number, since it is smaller than the sum of its proper divisors (24129095336).

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

21709814104 is a wasteful number, since it uses less digits than its factorization.

21709814104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7958191 (or 7958187 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The spelling of 21709814104 in words is "twenty-one billion, seven hundred nine million, eight hundred fourteen thousand, one hundred four".