31982934420 has 72 divisors (see below), whose sum is σ = 97029801960. Its totient is φ = 8527472640.

The previous prime is 31982934419. The next prime is 31982934427. The reversal of 31982934420 is 2443928913.

31982934420 is a `hidden beast` number, since 3 + 198 + 2 + 9 + 34 + 420 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 838449936 + 31144484484 = 28956^2 + 176478^2 .

It is a super-2 number, since 2×31982934420² (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 not an unprimeable number, because it can be changed into a prime (31982934427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1922940 + ... + 1939500.

Almost surely, 2^31982934420 is an apocalyptic number.

31982934420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31982934420 is an abundant number, since it is smaller than the sum of its proper divisors (65046867540).

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

31982934420 is a wasteful number, since it uses less digits than its factorization.

31982934420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27305 (or 27300 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 31982934420 in words is "thirty-one billion, nine hundred eighty-two million, nine hundred thirty-four thousand, four hundred twenty".