18643134 has 16 divisors (see below), whose sum is σ = 37572480. Its totient is φ = 6166680.

The previous prime is 18643129. The next prime is 18643147. The reversal of 18643134 is 43134681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11074 + ... + 12645.

It is an arithmetic number, because the mean of its divisors is an integer number (2348280).

Almost surely, 2^18643134 is an apocalyptic number.

18643134 is an abundant number, since it is smaller than the sum of its proper divisors (18929346).

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

18643134 is a wasteful number, since it uses less digits than its factorization.

18643134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23855.

The product of its digits is 6912, while the sum is 30.

The square root of 18643134 is about 4317.7695630962. The cubic root of 18643134 is about 265.1589600460.

The spelling of 18643134 in words is "eighteen million, six hundred forty-three thousand, one hundred thirty-four".