18928445456 has 40 divisors (see below), whose sum is σ = 38841034104. Its totient is φ = 8905236480.

The previous prime is 18928445453. The next prime is 18928445477. The reversal of 18928445456 is 65454482981.

It can be written as a sum of positive squares in 4 ways, for example, as 13331011600 + 5597433856 = 115460^2 + 74816^2 .

It is not an unprimeable number, because it can be changed into a prime (18928445453) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1593716 + ... + 1605548.

Almost surely, 2^18928445456 is an apocalyptic number.

18928445456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18928445456 is an abundant number, since it is smaller than the sum of its proper divisors (19912588648).

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

18928445456 is a wasteful number, since it uses less digits than its factorization.

18928445456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17739 (or 17733 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 56.

The spelling of 18928445456 in words is "eighteen billion, nine hundred twenty-eight million, four hundred forty-five thousand, four hundred fifty-six".