20500265640231 has 24 divisors (see below), whose sum is σ = 32205037790016. Its totient is φ = 12490641662400.

The previous prime is 20500265640181. The next prime is 20500265640307. The reversal of 20500265640231 is 13204656200502.

20500265640231 is a `hidden beast` number, since 2 + 0 + 5 + 0 + 0 + 2 + 6 + 5 + 640 + 2 + 3 + 1 = 666.

It is not a de Polignac number, because 20500265640231 - 2¹⁰ = 20500265639207 is a prime.

It is a super-2 number, since 2×20500265640231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20500265640031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 867393855 + ... + 867417488.

It is an arithmetic number, because the mean of its divisors is an integer number (1341876574584).

Almost surely, 2^{20500265640231} is an apocalyptic number.

20500265640231 is a deficient number, since it is larger than the sum of its proper divisors (11704772149785).

20500265640231 is a wasteful number, since it uses less digits than its factorization.

20500265640231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734811463 (or 1734811460 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 20500265640231 in words is "twenty trillion, five hundred billion, two hundred sixty-five million, six hundred forty thousand, two hundred thirty-one".