18872551830 has 64 divisors (see below), whose sum is σ = 49921256448. Its totient is φ = 4527989760.

The previous prime is 18872551807. The next prime is 18872551843. The reversal of 18872551830 is 3815527881.

It is a self number, because there is not a number n which added to its sum of digits gives 18872551830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262782 + ... + 326801.

It is an arithmetic number, because the mean of its divisors is an integer number (780019632).

Almost surely, 2^18872551830 is an apocalyptic number.

18872551830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18872551830 is an abundant number, since it is smaller than the sum of its proper divisors (31048704618).

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

18872551830 is a wasteful number, since it uses less digits than its factorization.

18872551830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589701.

The product of its (nonzero) digits is 537600, while the sum is 48.

The spelling of 18872551830 in words is "eighteen billion, eight hundred seventy-two million, five hundred fifty-one thousand, eight hundred thirty".