18643142 has 32 divisors (see below), whose sum is σ = 34003200. Its totient is φ = 7488288.

The previous prime is 18643129. The next prime is 18643147. The reversal of 18643142 is 24134681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18643147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28673 + ... + 29315.

It is an arithmetic number, because the mean of its divisors is an integer number (1062600).

Almost surely, 2^18643142 is an apocalyptic number.

18643142 is a deficient number, since it is larger than the sum of its proper divisors (15360058).

18643142 is a wasteful number, since it uses less digits than its factorization.

18643142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780.

The product of its digits is 4608, while the sum is 29.

The square root of 18643142 is about 4317.7704895003. The cubic root of 18643142 is about 265.1589979736.

The spelling of 18643142 in words is "eighteen million, six hundred forty-three thousand, one hundred forty-two".