18854955 has 72 divisors (see below), whose sum is σ = 40334112. Its totient is φ = 8096256.

The previous prime is 18854881. The next prime is 18854971. The reversal of 18854955 is 55945881.

It is a happy number.

It is not a de Polignac number, because 18854955 - 2⁹ = 18854443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18854955.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 37234 + ... + 37736.

It is an arithmetic number, because the mean of its divisors is an integer number (560196).

Almost surely, 2^18854955 is an apocalyptic number.

18854955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18854955 is an abundant number, since it is smaller than the sum of its proper divisors (21479157).

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

18854955 is a wasteful number, since it uses less digits than its factorization.

18854955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 535 counting only the distinct ones).

The product of its digits is 288000, while the sum is 45.

The square root of 18854955 is about 4342.2292661719. The cubic root of 18854955 is about 266.1594150614.

The spelling of 18854955 in words is "eighteen million, eight hundred fifty-four thousand, nine hundred fifty-five".