18898011 has 12 divisors (see below), whose sum is σ = 29778840. Its totient is φ = 11453280.

The previous prime is 18897971. The next prime is 18898037. The reversal of 18898011 is 11089881.

It is not a de Polignac number, because 18898011 - 2⁶ = 18897947 is a prime.

It is a super-2 number, since 2×18898011² = 714269639512242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18898091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95346 + ... + 95543.

It is an arithmetic number, because the mean of its divisors is an integer number (2481570).

Almost surely, 2^18898011 is an apocalyptic number.

18898011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18898011 is a deficient number, since it is larger than the sum of its proper divisors (10880829).

18898011 is a wasteful number, since it uses less digits than its factorization.

18898011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190906 (or 190903 counting only the distinct ones).

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

The square root of 18898011 is about 4347.1842611051. The cubic root of 18898011 is about 266.3618560624.

The spelling of 18898011 in words is "eighteen million, eight hundred ninety-eight thousand, eleven".