18858897 has 12 divisors (see below), whose sum is σ = 27874704. Its totient is φ = 12279960.

The previous prime is 18858877. The next prime is 18858901. The reversal of 18858897 is 79885881.

It is not a de Polignac number, because 18858897 - 2⁷ = 18858769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18858877) 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 11 ways as a sum of consecutive naturals, for example, 23979 + ... + 24752.

It is an arithmetic number, because the mean of its divisors is an integer number (2322892).

Almost surely, 2^18858897 is an apocalyptic number.

It is an amenable number.

18858897 is a deficient number, since it is larger than the sum of its proper divisors (9015807).

18858897 is a wasteful number, since it uses less digits than its factorization.

18858897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48780 (or 48777 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 54.

The square root of 18858897 is about 4342.6831567592. The cubic root of 18858897 is about 266.1779623929.

The spelling of 18858897 in words is "eighteen million, eight hundred fifty-eight thousand, eight hundred ninety-seven".