18280134 has 32 divisors (see below), whose sum is σ = 43014240. Its totient is φ = 5734656.

The previous prime is 18280099. The next prime is 18280159. The reversal of 18280134 is 43108281.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 18280098 and 18280107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9039 + ... + 10874.

It is an arithmetic number, because the mean of its divisors is an integer number (1344195).

Almost surely, 2^18280134 is an apocalyptic number.

18280134 is an abundant number, since it is smaller than the sum of its proper divisors (24734106).

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

18280134 is a wasteful number, since it uses less digits than its factorization.

18280134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19941 (or 19935 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 18280134 is about 4275.5273358967. The cubic root of 18280134 is about 263.4267001436.

The spelling of 18280134 in words is "eighteen million, two hundred eighty thousand, one hundred thirty-four".