18422131 has 8 divisors (see below), whose sum is σ = 22673504. Its totient is φ = 14575680.

The previous prime is 18422123. The next prime is 18422147. The reversal of 18422131 is 13122481.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18422131 - 2³ = 18422123 is a prime.

It is a super-2 number, since 2×18422131² = 678749821162322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18422171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101130 + ... + 101311.

It is an arithmetic number, because the mean of its divisors is an integer number (2834188).

Almost surely, 2^18422131 is an apocalyptic number.

18422131 is a deficient number, since it is larger than the sum of its proper divisors (4251373).

18422131 is a wasteful number, since it uses less digits than its factorization.

18422131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202461.

The product of its digits is 384, while the sum is 22.

The square root of 18422131 is about 4292.1010006755. The cubic root of 18422131 is about 264.1070263559.

The spelling of 18422131 in words is "eighteen million, four hundred twenty-two thousand, one hundred thirty-one".