18923551923 has 8 divisors (see below), whose sum is σ = 26559371200. Its totient is φ = 11951716968.

The previous prime is 18923551919. The next prime is 18923551937. The reversal of 18923551923 is 32915532981.

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

It is not a de Polignac number, because 18923551923 - 2² = 18923551919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18923551963) 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, 165996013 + ... + 165996126.

It is an arithmetic number, because the mean of its divisors is an integer number (3319921400).

Almost surely, 2^18923551923 is an apocalyptic number.

18923551923 is a deficient number, since it is larger than the sum of its proper divisors (7635819277).

18923551923 is a wasteful number, since it uses less digits than its factorization.

18923551923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331992161.

The product of its digits is 583200, while the sum is 48.

It can be divided in two parts, 18923 and 551923, that added together give a triangular number (570846 = T₁₀₆₈).

The spelling of 18923551923 in words is "eighteen billion, nine hundred twenty-three million, five hundred fifty-one thousand, nine hundred twenty-three".