18941642 has 4 divisors (see below), whose sum is σ = 28412466. Its totient is φ = 9470820.

The previous prime is 18941633. The next prime is 18941707. The reversal of 18941642 is 24614981.

It is a happy number.

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., 18395521 + 546121 = 4289^2 + 739^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4735409 + ... + 4735412.

Almost surely, 2^18941642 is an apocalyptic number.

18941642 is a deficient number, since it is larger than the sum of its proper divisors (9470824).

18941642 is an equidigital number, since it uses as much as digits as its factorization.

18941642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9470823.

The product of its digits is 13824, while the sum is 35.

The square root of 18941642 is about 4352.1996737282. The cubic root of 18941642 is about 266.5666871728.

The spelling of 18941642 in words is "eighteen million, nine hundred forty-one thousand, six hundred forty-two".