20660500454 has 32 divisors (see below), whose sum is σ = 33997017600. Its totient is φ = 9338761440.

The previous prime is 20660500433. The next prime is 20660500481. The reversal of 20660500454 is 45400506602.

It is a super-2 number, since 2×20660500454² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20660500454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5232509 + ... + 5236455.

It is an arithmetic number, because the mean of its divisors is an integer number (1062406800).

Almost surely, 2^20660500454 is an apocalyptic number.

20660500454 is a deficient number, since it is larger than the sum of its proper divisors (13336517146).

20660500454 is a wasteful number, since it uses less digits than its factorization.

20660500454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5228.

The product of its (nonzero) digits is 28800, while the sum is 32.

The spelling of 20660500454 in words is "twenty billion, six hundred sixty million, five hundred thousand, four hundred fifty-four".