31340031636 has 12 divisors (see below), whose sum is σ = 73126740512. Its totient is φ = 10446677208.

The previous prime is 31340031623. The next prime is 31340031637. The reversal of 31340031636 is 63613004313.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31340031637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1305834640 + ... + 1305834663.

Almost surely, 2^31340031636 is an apocalyptic number.

It is an amenable number.

31340031636 is an abundant number, since it is smaller than the sum of its proper divisors (41786708876).

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

31340031636 is a wasteful number, since it uses less digits than its factorization.

31340031636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2611669310 (or 2611669308 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 30.

Adding to 31340031636 its reverse (63613004313), we get a palindrome (94953035949).

The spelling of 31340031636 in words is "thirty-one billion, three hundred forty million, thirty-one thousand, six hundred thirty-six".