18928913684 has 6 divisors (see below), whose sum is σ = 33125598954. Its totient is φ = 9464456840.

The previous prime is 18928913639. The next prime is 18928913699. The reversal of 18928913684 is 48631982981.

It can be written as a sum of positive squares in only one way, i.e., 15094579600 + 3834334084 = 122860^2 + 61922^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2366114207 + ... + 2366114214.

It is an arithmetic number, because the mean of its divisors is an integer number (5520933159).

Almost surely, 2^18928913684 is an apocalyptic number.

It is an amenable number.

18928913684 is a deficient number, since it is larger than the sum of its proper divisors (14196685270).

18928913684 is a wasteful number, since it uses less digits than its factorization.

18928913684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4732228425 (or 4732228423 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 59.

The spelling of 18928913684 in words is "eighteen billion, nine hundred twenty-eight million, nine hundred thirteen thousand, six hundred eighty-four".