18662422 has 4 divisors (see below), whose sum is σ = 27993636. Its totient is φ = 9331210.

The previous prime is 18662411. The next prime is 18662429. The reversal of 18662422 is 22426681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22426681 = 163 ⋅137587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18662429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4665604 + ... + 4665607.

It is an arithmetic number, because the mean of its divisors is an integer number (6998409).

Almost surely, 2^18662422 is an apocalyptic number.

18662422 is a deficient number, since it is larger than the sum of its proper divisors (9331214).

18662422 is an equidigital number, since it uses as much as digits as its factorization.

18662422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9331213.

The product of its digits is 9216, while the sum is 31.

The square root of 18662422 is about 4320.0025462955. The cubic root of 18662422 is about 265.2503721314.

The spelling of 18662422 in words is "eighteen million, six hundred sixty-two thousand, four hundred twenty-two".