18732900428 has 36 divisors (see below), whose sum is σ = 36274035336. Its totient is φ = 8394926400.

The previous prime is 18732900419. The next prime is 18732900449. The reversal of 18732900428 is 82400923781.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 179576 + ... + 264032.

Almost surely, 2^18732900428 is an apocalyptic number.

It is an amenable number.

18732900428 is a deficient number, since it is larger than the sum of its proper divisors (17541134908).

18732900428 is a wasteful number, since it uses less digits than its factorization.

18732900428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84614 (or 84541 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 18732900428 in words is "eighteen billion, seven hundred thirty-two million, nine hundred thousand, four hundred twenty-eight".