18161422 has 8 divisors (see below), whose sum is σ = 27648936. Its totient is φ = 8945112.

The previous prime is 18161399. The next prime is 18161441. The reversal of 18161422 is 22416181.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67633 + ... + 67900.

It is an arithmetic number, because the mean of its divisors is an integer number (3456117).

Almost surely, 2^18161422 is an apocalyptic number.

18161422 is a deficient number, since it is larger than the sum of its proper divisors (9487514).

18161422 is a wasteful number, since it uses less digits than its factorization.

18161422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135602.

The product of its digits is 768, while the sum is 25.

The square root of 18161422 is about 4261.6219916834. The cubic root of 18161422 is about 262.8552264072.

The spelling of 18161422 in words is "eighteen million, one hundred sixty-one thousand, four hundred twenty-two".