31805873923 has 6 divisors (see below), whose sum is σ = 32864967492. Its totient is φ = 30779877060.

The previous prime is 31805873899. The next prime is 31805873951. The reversal of 31805873923 is 32937850813.

It is a de Polignac number, because none of the positive numbers 2^k-31805873923 is a prime.

It is a super-2 number, since 2×31805873923² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31805873963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16547361 + ... + 16549282.

It is an arithmetic number, because the mean of its divisors is an integer number (5477494582).

Almost surely, 2^31805873923 is an apocalyptic number.

31805873923 is a deficient number, since it is larger than the sum of its proper divisors (1059093569).

31805873923 is an equidigital number, since it uses as much as digits as its factorization.

31805873923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33096705 (or 33096674 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 31805873923 in words is "thirty-one billion, eight hundred five million, eight hundred seventy-three thousand, nine hundred twenty-three".