18908790080 has 42 divisors (see below), whose sum is σ = 45032414634. Its totient is φ = 7562532096.

The previous prime is 18908790071. The next prime is 18908790083. The reversal of 18908790080 is 8009780981.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15127032064 + 3781758016 = 122992^2 + 61496^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18908790083) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2455997 + ... + 2463683.

Almost surely, 2^18908790080 is an apocalyptic number.

18908790080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18908790080 is an abundant number, since it is smaller than the sum of its proper divisors (26123624554).

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

18908790080 is an frugal number, since it uses more digits than its factorization.

18908790080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15391 (or 7694 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 50.

The spelling of 18908790080 in words is "eighteen billion, nine hundred eight million, seven hundred ninety thousand, eighty".