18940319 has 8 divisors (see below), whose sum is σ = 19459440. Its totient is φ = 18424000.

The previous prime is 18940309. The next prime is 18940333. The reversal of 18940319 is 91304981.

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 18940319 - 2¹² = 18936223 is a prime.

It is a super-2 number, since 2×18940319² = 717471367643522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18940309) 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, 26669 + ... + 27369.

It is an arithmetic number, because the mean of its divisors is an integer number (2432430).

Almost surely, 2^18940319 is an apocalyptic number.

18940319 is a deficient number, since it is larger than the sum of its proper divisors (519121).

18940319 is an equidigital number, since it uses as much as digits as its factorization.

18940319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 18940319 is about 4352.0476789668. The cubic root of 18940319 is about 266.5604808130.

The spelling of 18940319 in words is "eighteen million, nine hundred forty thousand, three hundred nineteen".