20312031823578 has 24 divisors (see below), whose sum is σ = 48010257038016. Its totient is φ = 6155161158600.

The previous prime is 20312031823471. The next prime is 20312031823607. The reversal of 20312031823578 is 87532813021302.

20312031823578 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 20 + 31 + 8 + 23 + 578 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51293009458 + ... + 51293009853.

It is an arithmetic number, because the mean of its divisors is an integer number (2000427376584).

Almost surely, 2^{20312031823578} is an apocalyptic number.

20312031823578 is an abundant number, since it is smaller than the sum of its proper divisors (27698225214438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20312031823578 is a wasteful number, since it uses less digits than its factorization.

20312031823578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102586019330 (or 102586019327 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 20312031823578 in words is "twenty trillion, three hundred twelve billion, thirty-one million, eight hundred twenty-three thousand, five hundred seventy-eight".