18881134 has 12 divisors (see below), whose sum is σ = 28577664. Its totient is φ = 9355944.

The previous prime is 18881129. The next prime is 18881141. The reversal of 18881134 is 43118881.

It is a super-2 number, since 2×18881134² = 712994442251912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18881134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49107 + ... + 49489.

It is an arithmetic number, because the mean of its divisors is an integer number (2381472).

Almost surely, 2^18881134 is an apocalyptic number.

18881134 is a deficient number, since it is larger than the sum of its proper divisors (9696530).

18881134 is an equidigital number, since it uses as much as digits as its factorization.

18881134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 542 counting only the distinct ones).

The product of its digits is 6144, while the sum is 34.

The square root of 18881134 is about 4345.2426859728. The cubic root of 18881134 is about 266.2825403446.

The spelling of 18881134 in words is "eighteen million, eight hundred eighty-one thousand, one hundred thirty-four".