18969383 has 2 divisors, whose sum is σ = 18969384. Its totient is φ = 18969382.

The previous prime is 18969373. The next prime is 18969403. The reversal of 18969383 is 38396981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18969383 - 2²⁰ = 17920807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18969323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9484691 + 9484692.

It is an arithmetic number, because the mean of its divisors is an integer number (9484692).

Almost surely, 2^18969383 is an apocalyptic number.

18969383 is a deficient number, since it is larger than the sum of its proper divisors (1).

18969383 is an equidigital number, since it uses as much as digits as its factorization.

18969383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 18969383 is about 4355.3855168056. The cubic root of 18969383 is about 266.6967571948.

The spelling of 18969383 in words is "eighteen million, nine hundred sixty-nine thousand, three hundred eighty-three".