21790130814 has 16 divisors (see below), whose sum is σ = 48422513040. Its totient is φ = 7263376920.

The previous prime is 21790130777. The next prime is 21790130837. The reversal of 21790130814 is 41803109712.

It is a happy number.

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, 201760417 + ... + 201760524.

It is an arithmetic number, because the mean of its divisors is an integer number (3026407065).

Almost surely, 2^21790130814 is an apocalyptic number.

21790130814 is an abundant number, since it is smaller than the sum of its proper divisors (26632382226).

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

21790130814 is a wasteful number, since it uses less digits than its factorization.

21790130814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403520952 (or 403520946 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 21790130814 in words is "twenty-one billion, seven hundred ninety million, one hundred thirty thousand, eight hundred fourteen".