18855134 has 4 divisors (see below), whose sum is σ = 28282704. Its totient is φ = 9427566.

The previous prime is 18855119. The next prime is 18855143. The reversal of 18855134 is 43155881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43155881 = 457 ⋅94433.

It is a junction number, because it is equal to n+sod(n) for n = 18855094 and 18855103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4713782 + ... + 4713785.

It is an arithmetic number, because the mean of its divisors is an integer number (7070676).

Almost surely, 2^18855134 is an apocalyptic number.

18855134 is a deficient number, since it is larger than the sum of its proper divisors (9427570).

18855134 is an equidigital number, since it uses as much as digits as its factorization.

18855134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9427569.

The product of its digits is 19200, while the sum is 35.

The square root of 18855134 is about 4342.2498776556. The cubic root of 18855134 is about 266.1602573224.

The spelling of 18855134 in words is "eighteen million, eight hundred fifty-five thousand, one hundred thirty-four".