18540383 has 2 divisors, whose sum is σ = 18540384. Its totient is φ = 18540382.

The previous prime is 18540377. The next prime is 18540427. The reversal of 18540383 is 38304581.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18540383 - 2⁸ = 18540127 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18540343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9270191 + 9270192.

It is an arithmetic number, because the mean of its divisors is an integer number (9270192).

Almost surely, 2^18540383 is an apocalyptic number.

18540383 is a deficient number, since it is larger than the sum of its proper divisors (1).

18540383 is an equidigital number, since it uses as much as digits as its factorization.

18540383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 18540383 is about 4305.8545028833. The cubic root of 18540383 is about 264.6709241455.

The spelling of 18540383 in words is "eighteen million, five hundred forty thousand, three hundred eighty-three".