18899100 has 216 divisors, whose sum is σ = 68245632. Its totient is φ = 4329600.

The previous prime is 18899099. The next prime is 18899113. The reversal of 18899100 is 199881.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 227659 + ... + 227741.

It is an arithmetic number, because the mean of its divisors is an integer number (315952).

Almost surely, 2^18899100 is an apocalyptic number.

18899100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18899100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34122816).

18899100 is an abundant number, since it is smaller than the sum of its proper divisors (49346532).

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

18899100 is a wasteful number, since it uses less digits than its factorization.

18899100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 18899100 is about 4347.3095127906. The cubic root of 18899100 is about 266.3669723414.

The spelling of 18899100 in words is "eighteen million, eight hundred ninety-nine thousand, one hundred".