31696020 has 36 divisors (see below), whose sum is σ = 96145140. Its totient is φ = 8452224.

The previous prime is 31695997. The next prime is 31696037. The reversal of 31696020 is 2069613.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3944196 + 27751824 = 1986^2 + 5268^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87865 + ... + 88224.

Almost surely, 2^31696020 is an apocalyptic number.

31696020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31696020 is an abundant number, since it is smaller than the sum of its proper divisors (64449120).

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

31696020 is a wasteful number, since it uses less digits than its factorization.

31696020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176104 (or 176099 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 31696020 is about 5629.9218467044. The cubic root of 31696020 is about 316.4717224274.

The spelling of 31696020 in words is "thirty-one million, six hundred ninety-six thousand, twenty".