18922055 has 4 divisors (see below), whose sum is σ = 22706472. Its totient is φ = 15137640.

The previous prime is 18922051. The next prime is 18922069. The reversal of 18922055 is 55022981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55022981 = 13 ⋅4232537.

It is not a de Polignac number, because 18922055 - 2² = 18922051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18922051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1892201 + ... + 1892210.

It is an arithmetic number, because the mean of its divisors is an integer number (5676618).

Almost surely, 2^18922055 is an apocalyptic number.

18922055 is a deficient number, since it is larger than the sum of its proper divisors (3784417).

18922055 is an equidigital number, since it uses as much as digits as its factorization.

18922055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3784416.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 18922055 is about 4349.9488502740. The cubic root of 18922055 is about 266.4747725358.

The spelling of 18922055 in words is "eighteen million, nine hundred twenty-two thousand, fifty-five".