18811699220 has 24 divisors (see below), whose sum is σ = 39522789600. Its totient is φ = 7521208992.

The previous prime is 18811699219. The next prime is 18811699237. The reversal of 18811699220 is 2299611881.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172250 + ... + 259409.

It is an arithmetic number, because the mean of its divisors is an integer number (1646782900).

Almost surely, 2^18811699220 is an apocalyptic number.

18811699220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18811699220 is an abundant number, since it is smaller than the sum of its proper divisors (20711090380).

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

18811699220 is a wasteful number, since it uses less digits than its factorization.

18811699220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433847 (or 433845 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 47.

The spelling of 18811699220 in words is "eighteen billion, eight hundred eleven million, six hundred ninety-nine thousand, two hundred twenty".