18928494944 has 36 divisors (see below), whose sum is σ = 39330067644. Its totient is φ = 8966123712.

The previous prime is 18928494913. The next prime is 18928494961. The reversal of 18928494944 is 44949482981.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 807722 + ... + 830825.

It is an arithmetic number, because the mean of its divisors is an integer number (1092501879).

Almost surely, 2^18928494944 is an apocalyptic number.

It is an amenable number.

18928494944 is an abundant number, since it is smaller than the sum of its proper divisors (20401572700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18928494944 is a wasteful number, since it uses less digits than its factorization.

18928494944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638595 (or 1638568 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 62.

The spelling of 18928494944 in words is "eighteen billion, nine hundred twenty-eight million, four hundred ninety-four thousand, nine hundred forty-four".