18806874857623 has 8 divisors (see below), whose sum is σ = 19627878492288. Its totient is φ = 17986147341624.

The previous prime is 18806874857609. The next prime is 18806874857633. The reversal of 18806874857623 is 32675847860881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18806874857623 - 2¹⁷ = 18806874726551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18806874857633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68890465 + ... + 69162922.

It is an arithmetic number, because the mean of its divisors is an integer number (2453484811536).

Almost surely, 2^{18806874857623} is an apocalyptic number.

18806874857623 is a deficient number, since it is larger than the sum of its proper divisors (821003634665).

18806874857623 is a wasteful number, since it uses less digits than its factorization.

18806874857623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138059333.

The product of its (nonzero) digits is 867041280, while the sum is 73.

The spelling of 18806874857623 in words is "eighteen trillion, eight hundred six billion, eight hundred seventy-four million, eight hundred fifty-seven thousand, six hundred twenty-three".