18900329 has 8 divisors (see below), whose sum is σ = 22041600. Its totient is φ = 16199988.

The previous prime is 18900313. The next prime is 18900331. The reversal of 18900329 is 92300981.

It is not a de Polignac number, because 18900329 - 2⁴ = 18900313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18900295 and 18900304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18900389) 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, 27209 + ... + 27894.

It is an arithmetic number, because the mean of its divisors is an integer number (2755200).

Almost surely, 2^18900329 is an apocalyptic number.

It is an amenable number.

18900329 is a deficient number, since it is larger than the sum of its proper divisors (3141271).

18900329 is an frugal number, since it uses more digits than its factorization.

18900329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55124 (or 55110 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 18900329 is about 4347.4508622870. The cubic root of 18900329 is about 266.3727461245.

The spelling of 18900329 in words is "eighteen million, nine hundred thousand, three hundred twenty-nine".