18049999999 has 2 divisors, whose sum is σ = 18050000000. Its totient is φ = 18049999998.

The previous prime is 18049999987. The next prime is 18050000029. The reversal of 18049999999 is 99999994081.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18049999999 is a prime.

18049999999 is a modest number, since divided by 999999 gives 18049 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18049999909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9024999999 + 9025000000.

It is an arithmetic number, because the mean of its divisors is an integer number (9025000000).

Almost surely, 2^18049999999 is an apocalyptic number.

18049999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

18049999999 is an equidigital number, since it uses as much as digits as its factorization.

18049999999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153055008, while the sum is 76.

The spelling of 18049999999 in words is "eighteen billion, forty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".