18855954 has 48 divisors (see below), whose sum is σ = 44752344. Its totient is φ = 5702400.

The previous prime is 18855953. The next prime is 18855979. The reversal of 18855954 is 45955881.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12215025 + 6640929 = 3495^2 + 2577^2 .

It is not an unprimeable number, because it can be changed into a prime (18855953) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13614 + ... + 14934.

Almost surely, 2^18855954 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18855954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22376172).

18855954 is an abundant number, since it is smaller than the sum of its proper divisors (25896390).

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

18855954 is a wasteful number, since it uses less digits than its factorization.

18855954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403 (or 1400 counting only the distinct ones).

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

The square root of 18855954 is about 4342.3442977267. The cubic root of 18855954 is about 266.1641156570.

The spelling of 18855954 in words is "eighteen million, eight hundred fifty-five thousand, nine hundred fifty-four".