18742622 has 4 divisors (see below), whose sum is σ = 28113936. Its totient is φ = 9371310.

The previous prime is 18742597. The next prime is 18742627. The reversal of 18742622 is 22624781.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18742627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4685654 + ... + 4685657.

It is an arithmetic number, because the mean of its divisors is an integer number (7028484).

Almost surely, 2^18742622 is an apocalyptic number.

18742622 is a deficient number, since it is larger than the sum of its proper divisors (9371314).

18742622 is an equidigital number, since it uses as much as digits as its factorization.

18742622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9371313.

The product of its digits is 10752, while the sum is 32.

The square root of 18742622 is about 4329.2749970405. The cubic root of 18742622 is about 265.6297919689.

The spelling of 18742622 in words is "eighteen million, seven hundred forty-two thousand, six hundred twenty-two".