31402020412 has 12 divisors (see below), whose sum is σ = 62804040880. Its totient is φ = 13458008736.

The previous prime is 31402020409. The next prime is 31402020427. The reversal of 31402020412 is 21402020413.

31402020412 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 31402020412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560750337 + ... + 560750392.

Almost surely, 2^31402020412 is an apocalyptic number.

It is an amenable number.

31402020412 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31402020412 is a wasteful number, since it uses less digits than its factorization.

31402020412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121500740 (or 1121500738 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 31402020412 its reverse (21402020413), we get a palindrome (52804040825).

Subtracting from 31402020412 its reverse (21402020413), we obtain a palindrome (9999999999).

The spelling of 31402020412 in words is "thirty-one billion, four hundred two million, twenty thousand, four hundred twelve".