18870422 has 8 divisors (see below), whose sum is σ = 28528896. Its totient is φ = 9360792.

The previous prime is 18870389. The next prime is 18870469. The reversal of 18870422 is 22407881.

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, 36893 + ... + 37400.

It is an arithmetic number, because the mean of its divisors is an integer number (3566112).

Almost surely, 2^18870422 is an apocalyptic number.

18870422 is a deficient number, since it is larger than the sum of its proper divisors (9658474).

18870422 is a wasteful number, since it uses less digits than its factorization.

18870422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74422.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 18870422 is about 4344.0098986996. The cubic root of 18870422 is about 266.2321733456.

The spelling of 18870422 in words is "eighteen million, eight hundred seventy thousand, four hundred twenty-two".