31405742436 has 12 divisors (see below), whose sum is σ = 73280065712. Its totient is φ = 10468580808.

The previous prime is 31405742419. The next prime is 31405742441. The reversal of 31405742436 is 63424750413.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 31405742394 and 31405742403.

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, 1308572590 + ... + 1308572613.

Almost surely, 2^31405742436 is an apocalyptic number.

It is an amenable number.

31405742436 is an abundant number, since it is smaller than the sum of its proper divisors (41874323276).

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

31405742436 is a wasteful number, since it uses less digits than its factorization.

31405742436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2617145210 (or 2617145208 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 39.

The spelling of 31405742436 in words is "thirty-one billion, four hundred five million, seven hundred forty-two thousand, four hundred thirty-six".