2013646631 has 4 divisors (see below), whose sum is σ = 2017223832. Its totient is φ = 2010069432.

The previous prime is 2013646567. The next prime is 2013646637. The reversal of 2013646631 is 1366463102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2013646631 - 2⁶ = 2013646567 is a prime.

It is a super-2 number, since 2×2013646631² = 8109545509075300322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013646637) 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, 1787756 + ... + 1788881.

It is an arithmetic number, because the mean of its divisors is an integer number (504305958).

Almost surely, 2^2013646631 is an apocalyptic number.

2013646631 is a deficient number, since it is larger than the sum of its proper divisors (3577201).

2013646631 is an equidigital number, since it uses as much as digits as its factorization.

2013646631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3577200.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 2013646631 is about 44873.6741419733. The cubic root of 2013646631 is about 1262.7801697722.

The spelling of 2013646631 in words is "two billion, thirteen million, six hundred forty-six thousand, six hundred thirty-one".