18862313 has 2 divisors, whose sum is σ = 18862314. Its totient is φ = 18862312.

The previous prime is 18862279. The next prime is 18862321. The reversal of 18862313 is 31326881.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12652249 + 6210064 = 3557^2 + 2492^2 .

It is an emirp because it is prime and its reverse (31326881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18862313 - 2²⁰ = 17813737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18862313.

It is not a weakly prime, because it can be changed into another prime (18862343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9431156 + 9431157.

It is an arithmetic number, because the mean of its divisors is an integer number (9431157).

Almost surely, 2^18862313 is an apocalyptic number.

It is an amenable number.

18862313 is a deficient number, since it is larger than the sum of its proper divisors (1).

18862313 is an equidigital number, since it uses as much as digits as its factorization.

18862313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 32.

The square root of 18862313 is about 4343.0764441810. The cubic root of 18862313 is about 266.1940327747.

The spelling of 18862313 in words is "eighteen million, eight hundred sixty-two thousand, three hundred thirteen".