21790714679258 has 64 divisors (see below), whose sum is σ = 38848115289600. Its totient is φ = 9160067419776.

The previous prime is 21790714679249. The next prime is 21790714679269. The reversal of 21790714679258 is 85297641709712.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130550891 + ... + 130717697.

It is an arithmetic number, because the mean of its divisors is an integer number (607001801400).

Almost surely, 2^{21790714679258} is an apocalyptic number.

21790714679258 is a deficient number, since it is larger than the sum of its proper divisors (17057400610342).

21790714679258 is a wasteful number, since it uses less digits than its factorization.

21790714679258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170476 (or 170462 counting only the distinct ones).

The product of its (nonzero) digits is 106686720, while the sum is 68.

The spelling of 21790714679258 in words is "twenty-one trillion, seven hundred ninety billion, seven hundred fourteen million, six hundred seventy-nine thousand, two hundred fifty-eight".