18505799004 has 96 divisors (see below), whose sum is σ = 57001867776. Its totient is φ = 4523950080.

The previous prime is 18505798963. The next prime is 18505799009. The reversal of 18505799004 is 40099750581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18505799009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 573349 + ... + 604764.

It is an arithmetic number, because the mean of its divisors is an integer number (593769456).

Almost surely, 2^18505799004 is an apocalyptic number.

18505799004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18505799004 is an abundant number, since it is smaller than the sum of its proper divisors (38496068772).

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

18505799004 is a wasteful number, since it uses less digits than its factorization.

18505799004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178155 (or 1178153 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 48.

The spelling of 18505799004 in words is "eighteen billion, five hundred five million, seven hundred ninety-nine thousand, four".