18696708231 has 4 divisors (see below), whose sum is σ = 24928944312. Its totient is φ = 12464472152.

The previous prime is 18696708227. The next prime is 18696708287. The reversal of 18696708231 is 13280769681.

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 18696708231 - 2² = 18696708227 is a prime.

It is a super-2 number, since 2×18696708231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18696708031) 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, 3116118036 + ... + 3116118041.

It is an arithmetic number, because the mean of its divisors is an integer number (6232236078).

Almost surely, 2^18696708231 is an apocalyptic number.

18696708231 is a deficient number, since it is larger than the sum of its proper divisors (6232236081).

18696708231 is an equidigital number, since it uses as much as digits as its factorization.

18696708231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6232236080.

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 18696708231 in words is "eighteen billion, six hundred ninety-six million, seven hundred eight thousand, two hundred thirty-one".