18224642 has 16 divisors (see below), whose sum is σ = 27965952. Its totient is φ = 8905200.

The previous prime is 18224639. The next prime is 18224653. The reversal of 18224642 is 24642281.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16223 + ... + 17309.

It is an arithmetic number, because the mean of its divisors is an integer number (1747872).

Almost surely, 2^18224642 is an apocalyptic number.

18224642 is a deficient number, since it is larger than the sum of its proper divisors (9741310).

18224642 is a wasteful number, since it uses less digits than its factorization.

18224642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273.

The product of its digits is 6144, while the sum is 29.

The square root of 18224642 is about 4269.0329115621. The cubic root of 18224642 is about 263.1598733030.

It can be divided in two parts, 182 and 24642, that multiplied together give a palindrome (4484844).

The spelling of 18224642 in words is "eighteen million, two hundred twenty-four thousand, six hundred forty-two".