18419963 has 2 divisors, whose sum is σ = 18419964. Its totient is φ = 18419962.

The previous prime is 18419927. The next prime is 18419981. The reversal of 18419963 is 36991481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18419963 - 2⁶ = 18419899 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18419963.

It is not a weakly prime, because it can be changed into another prime (18419903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9209981 + 9209982.

It is an arithmetic number, because the mean of its divisors is an integer number (9209982).

Almost surely, 2^18419963 is an apocalyptic number.

18419963 is a deficient number, since it is larger than the sum of its proper divisors (1).

18419963 is an equidigital number, since it uses as much as digits as its factorization.

18419963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 41.

The square root of 18419963 is about 4291.8484362801. The cubic root of 18419963 is about 264.0966655115.

The spelling of 18419963 in words is "eighteen million, four hundred nineteen thousand, nine hundred sixty-three".