18938226 has 8 divisors (see below), whose sum is σ = 37876464. Its totient is φ = 6312740.

The previous prime is 18938209. The next prime is 18938239. The reversal of 18938226 is 62283981.

It is a happy number.

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

18938226 is an admirable 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, 1578180 + ... + 1578191.

It is an arithmetic number, because the mean of its divisors is an integer number (4734558).

Almost surely, 2^18938226 is an apocalyptic number.

18938226 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18938226 is a wasteful number, since it uses less digits than its factorization.

18938226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156376.

The product of its digits is 41472, while the sum is 39.

The square root of 18938226 is about 4351.8072108033. The cubic root of 18938226 is about 266.5506616958.

The spelling of 18938226 in words is "eighteen million, nine hundred thirty-eight thousand, two hundred twenty-six".