20686364506 has 16 divisors (see below), whose sum is σ = 32102943840. Its totient is φ = 9985459120.

The previous prime is 20686364483. The next prime is 20686364509. The reversal of 20686364506 is 60546368602.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20686364509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 992565 + ... + 1013191.

It is an arithmetic number, because the mean of its divisors is an integer number (2006433990).

Almost surely, 2^20686364506 is an apocalyptic number.

20686364506 is a deficient number, since it is larger than the sum of its proper divisors (11416579334).

20686364506 is a wasteful number, since it uses less digits than its factorization.

20686364506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37949.

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 20686364506 in words is "twenty billion, six hundred eighty-six million, three hundred sixty-four thousand, five hundred six".