18572920923 has 8 divisors (see below), whose sum is σ = 25840585728. Its totient is φ = 11843601704.

The previous prime is 18572920909. The next prime is 18572920967. The reversal of 18572920923 is 32902927581.

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 18572920923 - 2¹⁶ = 18572855387 is a prime.

It is a super-2 number, since 2×18572920923² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18572920823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134586315 + ... + 134586452.

It is an arithmetic number, because the mean of its divisors is an integer number (3230073216).

Almost surely, 2^18572920923 is an apocalyptic number.

18572920923 is a deficient number, since it is larger than the sum of its proper divisors (7267664805).

18572920923 is a wasteful number, since it uses less digits than its factorization.

18572920923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269172793.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 18572920923 in words is "eighteen billion, five hundred seventy-two million, nine hundred twenty thousand, nine hundred twenty-three".