16200138931 has 4 divisors (see below), whose sum is σ = 16576886392. Its totient is φ = 15823391472.

The previous prime is 16200138901. The next prime is 16200138953. The reversal of 16200138931 is 13983100261.

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 16200138931 - 2⁹ = 16200138419 is a prime.

It is a super-2 number, since 2×16200138931² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16200138901) 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, 188373666 + ... + 188373751.

It is an arithmetic number, because the mean of its divisors is an integer number (4144221598).

Almost surely, 2^16200138931 is an apocalyptic number.

16200138931 is a deficient number, since it is larger than the sum of its proper divisors (376747461).

16200138931 is an equidigital number, since it uses as much as digits as its factorization.

16200138931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376747460.

The product of its (nonzero) digits is 7776, while the sum is 34.

The spelling of 16200138931 in words is "sixteen billion, two hundred million, one hundred thirty-eight thousand, nine hundred thirty-one".