31820681354 has 32 divisors (see below), whose sum is σ = 60484378752. Its totient is φ = 12194424000.

The previous prime is 31820681327. The next prime is 31820681363. The reversal of 31820681354 is 45318602813.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1684277 + ... + 1703064.

It is an arithmetic number, because the mean of its divisors is an integer number (1890136836).

Almost surely, 2^31820681354 is an apocalyptic number.

31820681354 is a deficient number, since it is larger than the sum of its proper divisors (28663697398).

31820681354 is a wasteful number, since it uses less digits than its factorization.

31820681354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3387422.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 31820681354 in words is "thirty-one billion, eight hundred twenty million, six hundred eighty-one thousand, three hundred fifty-four".