13920563831 has 4 divisors (see below), whose sum is σ = 13923881664. Its totient is φ = 13917246000.

The previous prime is 13920563759. The next prime is 13920563837. The reversal of 13920563831 is 13836502931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13836502931 = 541 ⋅25575791.

It is a cyclic number.

It is not a de Polignac number, because 13920563831 - 2¹⁰ = 13920562807 is a prime.

It is a super-2 number, since 2×13920563831² (a number of 21 digits) 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 (13920563837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1652615 + ... + 1661016.

It is an arithmetic number, because the mean of its divisors is an integer number (3480970416).

Almost surely, 2^13920563831 is an apocalyptic number.

13920563831 is a deficient number, since it is larger than the sum of its proper divisors (3317833).

13920563831 is an equidigital number, since it uses as much as digits as its factorization.

13920563831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3317832.

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 13920563831 in words is "thirteen billion, nine hundred twenty million, five hundred sixty-three thousand, eight hundred thirty-one".