18626242 has 16 divisors (see below), whose sum is σ = 28598040. Its totient is φ = 9096192.

The previous prime is 18626233. The next prime is 18626243. The reversal of 18626242 is 24262681.

It can be written as a sum of positive squares in 4 ways, for example, as 6661561 + 11964681 = 2581^2 + 3459^2 .

It is not an unprimeable number, because it can be changed into a prime (18626243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15934 + ... + 17062.

Almost surely, 2^18626242 is an apocalyptic number.

18626242 is a deficient number, since it is larger than the sum of its proper divisors (9971798).

18626242 is a wasteful number, since it uses less digits than its factorization.

18626242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317.

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

The square root of 18626242 is about 4315.8130172657. The cubic root of 18626242 is about 265.0788515796.

The spelling of 18626242 in words is "eighteen million, six hundred twenty-six thousand, two hundred forty-two".