18910099080 has 64 divisors (see below), whose sum is σ = 63033667200. Its totient is φ = 5042692800.

The previous prime is 18910099057. The next prime is 18910099081. The reversal of 18910099080 is 8099001981.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (18910099081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8753596 + ... + 8755755.

It is an arithmetic number, because the mean of its divisors is an integer number (984901050).

Almost surely, 2^18910099080 is an apocalyptic number.

18910099080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18910099080 is an abundant number, since it is smaller than the sum of its proper divisors (44123568120).

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

18910099080 is a wasteful number, since it uses less digits than its factorization.

18910099080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17509371 (or 17509361 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The spelling of 18910099080 in words is "eighteen billion, nine hundred ten million, ninety-nine thousand, eighty".