31450120013 has 32 divisors (see below), whose sum is σ = 35487379200. Its totient is φ = 27671486976.

The previous prime is 31450120007. The next prime is 31450120043. The reversal of 31450120013 is 31002105413.

It is a cyclic number.

It is not a de Polignac number, because 31450120013 - 2⁴ = 31450119997 is a prime.

It is a super-2 number, since 2×31450120013² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31450120043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14715881 + ... + 14718017.

It is an arithmetic number, because the mean of its divisors is an integer number (1108980600).

Almost surely, 2^31450120013 is an apocalyptic number.

It is an amenable number.

31450120013 is a deficient number, since it is larger than the sum of its proper divisors (4037259187).

31450120013 is a wasteful number, since it uses less digits than its factorization.

31450120013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2661.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 31450120013 its reverse (31002105413), we get a palindrome (62452225426).

The spelling of 31450120013 in words is "thirty-one billion, four hundred fifty million, one hundred twenty thousand, thirteen".