18942419 has 2 divisors, whose sum is σ = 18942420. Its totient is φ = 18942418.

The previous prime is 18942401. The next prime is 18942439. The reversal of 18942419 is 91424981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18942419 - 2⁸ = 18942163 is a prime.

It is a super-2 number, since 2×18942419² = 717630475143122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18942439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9471209 + 9471210.

It is an arithmetic number, because the mean of its divisors is an integer number (9471210).

Almost surely, 2^18942419 is an apocalyptic number.

18942419 is a deficient number, since it is larger than the sum of its proper divisors (1).

18942419 is an equidigital number, since it uses as much as digits as its factorization.

18942419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 18942419 is about 4352.2889380187. The cubic root of 18942419 is about 266.5703320431.

The spelling of 18942419 in words is "eighteen million, nine hundred forty-two thousand, four hundred nineteen".