18885521400 has 96 divisors (see below), whose sum is σ = 59092467840. Its totient is φ = 4989055360.

The previous prime is 18885521399. The next prime is 18885521401. The reversal of 18885521400 is 412558881.

It is an interprime number because it is at equal distance from previous prime (18885521399) and next prime (18885521401).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18885521401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82884 + ... + 211283.

It is an arithmetic number, because the mean of its divisors is an integer number (615546540).

Almost surely, 2^18885521400 is an apocalyptic number.

18885521400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18885521400 is an abundant number, since it is smaller than the sum of its proper divisors (40206946440).

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

18885521400 is a wasteful number, since it uses less digits than its factorization.

18885521400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294293 (or 294284 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 42.

The spelling of 18885521400 in words is "eighteen billion, eight hundred eighty-five million, five hundred twenty-one thousand, four hundred".