18640103 has 2 divisors, whose sum is σ = 18640104. Its totient is φ = 18640102.

The previous prime is 18640093. The next prime is 18640241. The reversal of 18640103 is 30104681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18640103 - 2⁴ = 18640087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18640403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9320051 + 9320052.

It is an arithmetic number, because the mean of its divisors is an integer number (9320052).

Almost surely, 2^18640103 is an apocalyptic number.

18640103 is a deficient number, since it is larger than the sum of its proper divisors (1).

18640103 is an equidigital number, since it uses as much as digits as its factorization.

18640103 is an evil number, because the sum of its binary digits is even.

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

The square root of 18640103 is about 4317.4185574253. The cubic root of 18640103 is about 265.1445894227.

Adding to 18640103 its reverse (30104681), we get a palindrome (48744784).

The spelling of 18640103 in words is "eighteen million, six hundred forty thousand, one hundred three".