18005051500 has 24 divisors (see below), whose sum is σ = 39323033568. Its totient is φ = 7202020400.

The previous prime is 18005051489. The next prime is 18005051527. The reversal of 18005051500 is 515050081.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18004552 + ... + 18005551.

It is an arithmetic number, because the mean of its divisors is an integer number (1638459732).

Almost surely, 2^18005051500 is an apocalyptic number.

18005051500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18005051500 is an abundant number, since it is smaller than the sum of its proper divisors (21317982068).

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

18005051500 is a wasteful number, since it uses less digits than its factorization.

18005051500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36010122 (or 36010110 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 25.

The spelling of 18005051500 in words is "eighteen billion, five million, fifty-one thousand, five hundred".