13816971937 has 4 divisors (see below), whose sum is σ = 13901738800. Its totient is φ = 13732205076.

The previous prime is 13816971923. The next prime is 13816971943. The reversal of 13816971937 is 73917961831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13816971937 - 2⁷ = 13816971809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13816971037) 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, 42383187 + ... + 42383512.

It is an arithmetic number, because the mean of its divisors is an integer number (3475434700).

Almost surely, 2^13816971937 is an apocalyptic number.

It is an amenable number.

13816971937 is a deficient number, since it is larger than the sum of its proper divisors (84766863).

13816971937 is an equidigital number, since it uses as much as digits as its factorization.

13816971937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84766862.

The product of its digits is 1714608, while the sum is 55.

The spelling of 13816971937 in words is "thirteen billion, eight hundred sixteen million, nine hundred seventy-one thousand, nine hundred thirty-seven".