18899088 has 80 divisors (see below), whose sum is σ = 54329856. Its totient is φ = 5621760.

The previous prime is 18899071. The next prime is 18899099. The reversal of 18899088 is 88099881.

It is a self number, because there is not a number n which added to its sum of digits gives 18899088.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18856 + ... + 19832.

Almost surely, 2^18899088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18899088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27164928).

18899088 is an abundant number, since it is smaller than the sum of its proper divisors (35430768).

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

18899088 is a wasteful number, since it uses less digits than its factorization.

18899088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032 (or 1026 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 51.

The square root of 18899088 is about 4347.3081326264. The cubic root of 18899088 is about 266.3669159647.

The spelling of 18899088 in words is "eighteen million, eight hundred ninety-nine thousand, eighty-eight".