18897055 has 16 divisors (see below), whose sum is σ = 23425920. Its totient is φ = 14625792.

The previous prime is 18897049. The next prime is 18897113. The reversal of 18897055 is 55079881.

It is a cyclic number.

It is not a de Polignac number, because 18897055 - 2⁹ = 18896543 is a prime.

It is a cake number, because a cake can be divided into 18897055 parts by 484 planar cuts.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22381 + ... + 23209.

It is an arithmetic number, because the mean of its divisors is an integer number (1464120).

Almost surely, 2^18897055 is an apocalyptic number.

18897055 is a deficient number, since it is larger than the sum of its proper divisors (4528865).

18897055 is an equidigital number, since it uses as much as digits as its factorization.

18897055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978.

The product of its (nonzero) digits is 100800, while the sum is 43.

The square root of 18897055 is about 4347.0743034827. The cubic root of 18897055 is about 266.3573644746.

The spelling of 18897055 in words is "eighteen million, eight hundred ninety-seven thousand, fifty-five".