18894129 has 8 divisors (see below), whose sum is σ = 25667712. Its totient is φ = 12358320.

The previous prime is 18894091. The next prime is 18894133. The reversal of 18894129 is 92149881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18894129 - 2⁸ = 18893873 is a prime.

It is a super-2 number, since 2×18894129² = 713976221337282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18894149) 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, 59257 + ... + 59574.

It is an arithmetic number, because the mean of its divisors is an integer number (3208464).

Almost surely, 2^18894129 is an apocalyptic number.

It is an amenable number.

18894129 is a deficient number, since it is larger than the sum of its proper divisors (6773583).

18894129 is a wasteful number, since it uses less digits than its factorization.

18894129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118887.

The product of its digits is 41472, while the sum is 42.

The square root of 18894129 is about 4346.7377422614. The cubic root of 18894129 is about 266.3436162675.

The spelling of 18894129 in words is "eighteen million, eight hundred ninety-four thousand, one hundred twenty-nine".