18939001 has 8 divisors (see below), whose sum is σ = 19641600. Its totient is φ = 18239760.

The previous prime is 18938999. The next prime is 18939013. The reversal of 18939001 is 10093981.

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 18939001 - 2¹ = 18938999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18939031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18616 + ... + 19606.

It is an arithmetic number, because the mean of its divisors is an integer number (2455200).

Almost surely, 2^18939001 is an apocalyptic number.

It is an amenable number.

18939001 is a deficient number, since it is larger than the sum of its proper divisors (702599).

18939001 is an equidigital number, since it uses as much as digits as its factorization.

18939001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 18939001 is about 4351.8962533590. The cubic root of 18939001 is about 266.5542976214.

The spelling of 18939001 in words is "eighteen million, nine hundred thirty-nine thousand, one".