18039249203 has 2 divisors, whose sum is σ = 18039249204. Its totient is φ = 18039249202.

The previous prime is 18039249199. The next prime is 18039249271. The reversal of 18039249203 is 30294293081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18039249203 - 2² = 18039249199 is a prime.

It is a super-2 number, since 2×18039249203² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18039240203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9019624601 + 9019624602.

It is an arithmetic number, because the mean of its divisors is an integer number (9019624602).

Almost surely, 2^18039249203 is an apocalyptic number.

18039249203 is a deficient number, since it is larger than the sum of its proper divisors (1).

18039249203 is an equidigital number, since it uses as much as digits as its factorization.

18039249203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 18039249203 in words is "eighteen billion, thirty-nine million, two hundred forty-nine thousand, two hundred three".