18422051 has 4 divisors (see below), whose sum is σ = 18585192. Its totient is φ = 18258912.

The previous prime is 18422009. The next prime is 18422071. The reversal of 18422051 is 15022481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15022481 = 37 ⋅406013.

It is a cyclic number.

It is not a de Polignac number, because 18422051 - 2⁶ = 18421987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18422071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81401 + ... + 81626.

It is an arithmetic number, because the mean of its divisors is an integer number (4646298).

Almost surely, 2^18422051 is an apocalyptic number.

18422051 is a deficient number, since it is larger than the sum of its proper divisors (163141).

18422051 is a wasteful number, since it uses less digits than its factorization.

18422051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163140.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 18422051 is about 4292.0916812202. The cubic root of 18422051 is about 264.1066440513.

The spelling of 18422051 in words is "eighteen million, four hundred twenty-two thousand, fifty-one".