18811142 has 8 divisors (see below), whose sum is σ = 32247696. Its totient is φ = 8061912.

The previous prime is 18811123. The next prime is 18811153. The reversal of 18811142 is 24111881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671813 + ... + 671840.

It is an arithmetic number, because the mean of its divisors is an integer number (4030962).

Almost surely, 2^18811142 is an apocalyptic number.

18811142 is a deficient number, since it is larger than the sum of its proper divisors (13436554).

18811142 is a wasteful number, since it uses less digits than its factorization.

18811142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343662.

The product of its digits is 512, while the sum is 26.

The square root of 18811142 is about 4337.1813427617. The cubic root of 18811142 is about 265.9530981810.

The spelling of 18811142 in words is "eighteen million, eight hundred eleven thousand, one hundred forty-two".