31920983190 has 24 divisors (see below), whose sum is σ = 82994556528. Its totient is φ = 8512262160.

The previous prime is 31920983183. The next prime is 31920983257. The reversal of 31920983190 is 9138902913.

It is a happy number.

It is a super-2 number, since 2×31920983190² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 177338706 + ... + 177338885.

It is an arithmetic number, because the mean of its divisors is an integer number (3458106522).

Almost surely, 2^31920983190 is an apocalyptic number.

31920983190 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31920983190 is an abundant number, since it is smaller than the sum of its proper divisors (51073573338).

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

31920983190 is a wasteful number, since it uses less digits than its factorization.

31920983190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354677604 (or 354677601 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 31920983190 in words is "thirty-one billion, nine hundred twenty million, nine hundred eighty-three thousand, one hundred ninety".