18890142 has 16 divisors (see below), whose sum is σ = 39768960. Its totient is φ = 5965272.

The previous prime is 18890117. The next prime is 18890147. The reversal of 18890142 is 24109881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18890147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82738 + ... + 82965.

It is an arithmetic number, because the mean of its divisors is an integer number (2485560).

Almost surely, 2^18890142 is an apocalyptic number.

18890142 is an abundant number, since it is smaller than the sum of its proper divisors (20878818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18890142 is a wasteful number, since it uses less digits than its factorization.

18890142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165727.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 18890142 is about 4346.2790982632. The cubic root of 18890142 is about 266.3248805233.

The spelling of 18890142 in words is "eighteen million, eight hundred ninety thousand, one hundred forty-two".