31677427836 has 240 divisors, whose sum is σ = 93177453600. Its totient is φ = 9325228032.

The previous prime is 31677427823. The next prime is 31677427849. The reversal of 31677427836 is 63872477613.

It is an interprime number because it is at equal distance from previous prime (31677427823) and next prime (31677427849).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11405680 + ... + 11408456.

It is an arithmetic number, because the mean of its divisors is an integer number (388239390).

Almost surely, 2^31677427836 is an apocalyptic number.

31677427836 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31677427836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46588726800).

31677427836 is an abundant number, since it is smaller than the sum of its proper divisors (61500025764).

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

31677427836 is a wasteful number, since it uses less digits than its factorization.

31677427836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2938 (or 2927 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 54.

The spelling of 31677427836 in words is "thirty-one billion, six hundred seventy-seven million, four hundred twenty-seven thousand, eight hundred thirty-six".