18916363 has 2 divisors, whose sum is σ = 18916364. Its totient is φ = 18916362.

The previous prime is 18916351. The next prime is 18916369. The reversal of 18916363 is 36361981.

It is a strong prime.

It is an emirp because it is prime and its reverse (36361981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18916363 - 2⁹ = 18915851 is a prime.

It is not a weakly prime, because it can be changed into another prime (18916369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9458181 + 9458182.

It is an arithmetic number, because the mean of its divisors is an integer number (9458182).

Almost surely, 2^18916363 is an apocalyptic number.

18916363 is a deficient number, since it is larger than the sum of its proper divisors (1).

18916363 is an equidigital number, since it uses as much as digits as its factorization.

18916363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 18916363 is about 4349.2945404973. The cubic root of 18916363 is about 266.4480501648.

The spelling of 18916363 in words is "eighteen million, nine hundred sixteen thousand, three hundred sixty-three".