20659799986 has 32 divisors (see below), whose sum is σ = 37330197120. Its totient is φ = 8377084800.

The previous prime is 20659799981. The next prime is 20659799987. The reversal of 20659799986 is 68999795602.

It is not an unprimeable number, because it can be changed into a prime (20659799981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151396 + ... + 253456.

It is an arithmetic number, because the mean of its divisors is an integer number (1166568660).

Almost surely, 2^20659799986 is an apocalyptic number.

20659799986 is a deficient number, since it is larger than the sum of its proper divisors (16670397134).

20659799986 is a wasteful number, since it uses less digits than its factorization.

20659799986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102850.

The product of its (nonzero) digits is 132269760, while the sum is 70.

The spelling of 20659799986 in words is "twenty billion, six hundred fifty-nine million, seven hundred ninety-nine thousand, nine hundred eighty-six".