18210739903 has 2 divisors, whose sum is σ = 18210739904. Its totient is φ = 18210739902.

The previous prime is 18210739879. The next prime is 18210739927. The reversal of 18210739903 is 30993701281.

It is a balanced prime because it is at equal distance from previous prime (18210739879) and next prime (18210739927).

It is an emirp because it is prime and its reverse (30993701281) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18210739903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18210739903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18210739973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9105369951 + 9105369952.

It is an arithmetic number, because the mean of its divisors is an integer number (9105369952).

Almost surely, 2^18210739903 is an apocalyptic number.

18210739903 is a deficient number, since it is larger than the sum of its proper divisors (1).

18210739903 is an equidigital number, since it uses as much as digits as its factorization.

18210739903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 18210739903 in words is "eighteen billion, two hundred ten million, seven hundred thirty-nine thousand, nine hundred three".