18403654564 has 12 divisors (see below), whose sum is σ = 32207453824. Its totient is φ = 9201524904.

The previous prime is 18403654559. The next prime is 18403654571. The reversal of 18403654564 is 46545630481.

It is a super-2 number, since 2×18403654564² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114409 + ... + 223375.

Almost surely, 2^18403654564 is an apocalyptic number.

It is an amenable number.

18403654564 is a deficient number, since it is larger than the sum of its proper divisors (13803799260).

18403654564 is a wasteful number, since it uses less digits than its factorization.

18403654564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151194 (or 151192 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 46.

The spelling of 18403654564 in words is "eighteen billion, four hundred three million, six hundred fifty-four thousand, five hundred sixty-four".