18763642 has 4 divisors (see below), whose sum is σ = 28145466. Its totient is φ = 9381820.

The previous prime is 18763639. The next prime is 18763663. The reversal of 18763642 is 24636781.

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

It can be written as a sum of positive squares in only one way, i.e., 10055241 + 8708401 = 3171^2 + 2951^2 .

It is a super-2 number, since 2×18763642² = 704148522208328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4690909 + ... + 4690912.

Almost surely, 2^18763642 is an apocalyptic number.

18763642 is a deficient number, since it is larger than the sum of its proper divisors (9381824).

18763642 is an equidigital number, since it uses as much as digits as its factorization.

18763642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9381823.

The product of its digits is 48384, while the sum is 37.

The square root of 18763642 is about 4331.7019749747. The cubic root of 18763642 is about 265.7290568459.

The spelling of 18763642 in words is "eighteen million, seven hundred sixty-three thousand, six hundred forty-two".