18412313 has 2 divisors, whose sum is σ = 18412314. Its totient is φ = 18412312.

The previous prime is 18412291. The next prime is 18412319. The reversal of 18412313 is 31321481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9815689 + 8596624 = 3133^2 + 2932^2 .

It is a cyclic number.

It is not a de Polignac number, because 18412313 - 2¹⁶ = 18346777 is a prime.

It is not a weakly prime, because it can be changed into another prime (18412319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9206156 + 9206157.

It is an arithmetic number, because the mean of its divisors is an integer number (9206157).

Almost surely, 2^18412313 is an apocalyptic number.

It is an amenable number.

18412313 is a deficient number, since it is larger than the sum of its proper divisors (1).

18412313 is an equidigital number, since it uses as much as digits as its factorization.

18412313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 18412313 is about 4290.9571193383. The cubic root of 18412313 is about 264.0600997623.

Adding to 18412313 its reverse (31321481), we get a palindrome (49733794).

The spelling of 18412313 in words is "eighteen million, four hundred twelve thousand, three hundred thirteen".