20312031823579 has 4 divisors (see below), whose sum is σ = 21506857224984. Its totient is φ = 19117206422176.

The previous prime is 20312031823471. The next prime is 20312031823607. The reversal of 20312031823579 is 97532813021302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20312031823579 - 2⁷ = 20312031823451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20312031823379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597412700677 + ... + 597412700710.

It is an arithmetic number, because the mean of its divisors is an integer number (5376714306246).

Almost surely, 2^{20312031823579} is an apocalyptic number.

20312031823579 is a deficient number, since it is larger than the sum of its proper divisors (1194825401405).

20312031823579 is a wasteful number, since it uses less digits than its factorization.

20312031823579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194825401404.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 20312031823579 in words is "twenty trillion, three hundred twelve billion, thirty-one million, eight hundred twenty-three thousand, five hundred seventy-nine".