18424943564 has 6 divisors (see below), whose sum is σ = 32243651244. Its totient is φ = 9212471780.

The previous prime is 18424943531. The next prime is 18424943567. The reversal of 18424943564 is 46534942481.

It is not an unprimeable number, because it can be changed into a prime (18424943567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2303117942 + ... + 2303117949.

It is an arithmetic number, because the mean of its divisors is an integer number (5373941874).

Almost surely, 2^18424943564 is an apocalyptic number.

It is an amenable number.

18424943564 is a deficient number, since it is larger than the sum of its proper divisors (13818707680).

18424943564 is a wasteful number, since it uses less digits than its factorization.

18424943564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4606235895 (or 4606235893 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 50.

The spelling of 18424943564 in words is "eighteen billion, four hundred twenty-four million, nine hundred forty-three thousand, five hundred sixty-four".