18906254923 has 8 divisors (see below), whose sum is σ = 19414660608. Its totient is φ = 18403467264.

The previous prime is 18906254911. The next prime is 18906254987. The reversal of 18906254923 is 32945260981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18906254923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18906254993) 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, 1397686 + ... + 1411147.

It is an arithmetic number, because the mean of its divisors is an integer number (2426832576).

Almost surely, 2^18906254923 is an apocalyptic number.

18906254923 is a deficient number, since it is larger than the sum of its proper divisors (508405685).

18906254923 is a wasteful number, since it uses less digits than its factorization.

18906254923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2809013.

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 18906254923 in words is "eighteen billion, nine hundred six million, two hundred fifty-four thousand, nine hundred twenty-three".