18515470628 has 12 divisors (see below), whose sum is σ = 32404253952. Its totient is φ = 9257112360.

The previous prime is 18515470609. The next prime is 18515470651. The reversal of 18515470628 is 82607451581.

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, 85328 + ... + 210503.

It is an arithmetic number, because the mean of its divisors is an integer number (2700354496).

Almost surely, 2^18515470628 is an apocalyptic number.

It is an amenable number.

18515470628 is a deficient number, since it is larger than the sum of its proper divisors (13888783324).

18515470628 is a wasteful number, since it uses less digits than its factorization.

18515470628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311482 (or 311480 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 47.

The spelling of 18515470628 in words is "eighteen billion, five hundred fifteen million, four hundred seventy thousand, six hundred twenty-eight".