18814782100 has 36 divisors (see below), whose sum is σ = 40837323744. Its totient is φ = 7524208480.

The previous prime is 18814782097. The next prime is 18814782109. The reversal of 18814782100 is 128741881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18814782109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 481497 + ... + 519103.

It is an arithmetic number, because the mean of its divisors is an integer number (1134370104).

Almost surely, 2^18814782100 is an apocalyptic number.

18814782100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18814782100 is an abundant number, since it is smaller than the sum of its proper divisors (22022541644).

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

18814782100 is a wasteful number, since it uses less digits than its factorization.

18814782100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42624 (or 42617 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 40.

The spelling of 18814782100 in words is "eighteen billion, eight hundred fourteen million, seven hundred eighty-two thousand, one hundred".