21079270916 has 12 divisors (see below), whose sum is σ = 40242244560. Its totient is φ = 9581486760.

The previous prime is 21079270913. The next prime is 21079270951. The reversal of 21079270916 is 61907297012.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 479074339 = 21079270916 / (2 + 1 + 0 + 7 + 9 + 2 + 7 + 0 + 9 + 1 + 6).

It is not an unprimeable number, because it can be changed into a prime (21079270913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239537126 + ... + 239537213.

It is an arithmetic number, because the mean of its divisors is an integer number (3353520380).

Almost surely, 2^21079270916 is an apocalyptic number.

It is an amenable number.

21079270916 is a deficient number, since it is larger than the sum of its proper divisors (19162973644).

21079270916 is a wasteful number, since it uses less digits than its factorization.

21079270916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479074354 (or 479074352 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 44.

The spelling of 21079270916 in words is "twenty-one billion, seventy-nine million, two hundred seventy thousand, nine hundred sixteen".