18022155 has 16 divisors (see below), whose sum is σ = 28905984. Its totient is φ = 9588320.

The previous prime is 18022153. The next prime is 18022157. The reversal of 18022155 is 55122081.

It is an interprime number because it is at equal distance from previous prime (18022153) and next prime (18022157).

It is not a de Polignac number, because 18022155 - 2¹ = 18022153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18022153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6142 + ... + 8588.

It is an arithmetic number, because the mean of its divisors is an integer number (1806624).

Almost surely, 2^18022155 is an apocalyptic number.

18022155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18022155 is a deficient number, since it is larger than the sum of its proper divisors (10883829).

18022155 is a wasteful number, since it uses less digits than its factorization.

18022155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 18022155 is about 4245.2508759789. The cubic root of 18022155 is about 262.1816185322.

The spelling of 18022155 in words is "eighteen million, twenty-two thousand, one hundred fifty-five".