18920329 has 8 divisors (see below), whose sum is σ = 19926720. Its totient is φ = 17929296.

The previous prime is 18920327. The next prime is 18920347. The reversal of 18920329 is 92302981.

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

It is a cyclic number.

It is not a de Polignac number, because 18920329 - 2¹ = 18920327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18920294 and 18920303.

It is not an unprimeable number, because it can be changed into a prime (18920327) 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, 1267 + ... + 6280.

It is an arithmetic number, because the mean of its divisors is an integer number (2490840).

Almost surely, 2^18920329 is an apocalyptic number.

It is an amenable number.

18920329 is a deficient number, since it is larger than the sum of its proper divisors (1006391).

18920329 is a wasteful number, since it uses less digits than its factorization.

18920329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7679.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 18920329 is about 4349.7504526122. The cubic root of 18920329 is about 266.4666700078.

The spelling of 18920329 in words is "eighteen million, nine hundred twenty thousand, three hundred twenty-nine".