18811098 has 12 divisors (see below), whose sum is σ = 40757418. Its totient is φ = 6270360.

The previous prime is 18811073. The next prime is 18811099. The reversal of 18811098 is 89011881.

It can be written as a sum of positive squares in only one way, i.e., 17363889 + 1447209 = 4167^2 + 1203^2 .

It is not an unprimeable number, because it can be changed into a prime (18811099) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 522513 + ... + 522548.

Almost surely, 2^18811098 is an apocalyptic number.

18811098 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18811098 is an abundant number, since it is smaller than the sum of its proper divisors (21946320).

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

18811098 is a wasteful number, since it uses less digits than its factorization.

18811098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045069 (or 1045066 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The square root of 18811098 is about 4337.1762703400. The cubic root of 18811098 is about 265.9528908226.

The spelling of 18811098 in words is "eighteen million, eight hundred eleven thousand, ninety-eight".