18898413 has 16 divisors (see below), whose sum is σ = 25749696. Its totient is φ = 12326400.

The previous prime is 18898409. The next prime is 18898421. The reversal of 18898413 is 31489881.

It is not a de Polignac number, because 18898413 - 2² = 18898409 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18898403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29070 + ... + 29712.

It is an arithmetic number, because the mean of its divisors is an integer number (1609356).

Almost surely, 2^18898413 is an apocalyptic number.

It is an amenable number.

18898413 is a deficient number, since it is larger than the sum of its proper divisors (6851283).

18898413 is a wasteful number, since it uses less digits than its factorization.

18898413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844.

The product of its digits is 55296, while the sum is 42.

The square root of 18898413 is about 4347.2304976847. The cubic root of 18898413 is about 266.3637447392.

The spelling of 18898413 in words is "eighteen million, eight hundred ninety-eight thousand, four hundred thirteen".