31402693905 has 32 divisors (see below), whose sum is σ = 54820896768. Its totient is φ = 15223070400.

The previous prime is 31402693867. The next prime is 31402693939. The reversal of 31402693905 is 50939620413.

It is a happy number.

It is not a de Polignac number, because 31402693905 - 2⁹ = 31402693393 is a prime.

It is a super-2 number, since 2×31402693905² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1382490 + ... + 1405020.

It is an arithmetic number, because the mean of its divisors is an integer number (1713153024).

Almost surely, 2^31402693905 is an apocalyptic number.

It is an amenable number.

31402693905 is a deficient number, since it is larger than the sum of its proper divisors (23418202863).

31402693905 is a wasteful number, since it uses less digits than its factorization.

31402693905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30997.

The product of its (nonzero) digits is 174960, while the sum is 42.

The spelling of 31402693905 in words is "thirty-one billion, four hundred two million, six hundred ninety-three thousand, nine hundred five".