18955755 has 64 divisors (see below), whose sum is σ = 41502720. Its totient is φ = 7993728.

The previous prime is 18955751. The next prime is 18955757. The reversal of 18955755 is 55755981.

It is not a de Polignac number, because 18955755 - 2² = 18955751 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 18955755.

It is not an unprimeable number, because it can be changed into a prime (18955751) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11514 + ... + 13056.

It is an arithmetic number, because the mean of its divisors is an integer number (648480).

Almost surely, 2^18955755 is an apocalyptic number.

18955755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18955755 is an abundant number, since it is smaller than the sum of its proper divisors (22546965).

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

18955755 is a wasteful number, since it uses less digits than its factorization.

18955755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577 (or 1571 counting only the distinct ones).

The product of its digits is 315000, while the sum is 45.

The square root of 18955755 is about 4353.8207358595. The cubic root of 18955755 is about 266.6328750584.

The spelling of 18955755 in words is "eighteen million, nine hundred fifty-five thousand, seven hundred fifty-five".