18722055 has 16 divisors (see below), whose sum is σ = 32678784. Its totient is φ = 9077280.

The previous prime is 18722051. The next prime is 18722089. The reversal of 18722055 is 55022781.

It is not a de Polignac number, because 18722055 - 2² = 18722051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18722051) 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 15 ways as a sum of consecutive naturals, for example, 56569 + ... + 56898.

It is an arithmetic number, because the mean of its divisors is an integer number (2042424).

Almost surely, 2^18722055 is an apocalyptic number.

18722055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18722055 is a deficient number, since it is larger than the sum of its proper divisors (13956729).

18722055 is a wasteful number, since it uses less digits than its factorization.

18722055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113486.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 18722055 is about 4326.8990050612. The cubic root of 18722055 is about 265.5325944783.

The spelling of 18722055 in words is "eighteen million, seven hundred twenty-two thousand, fifty-five".