18200049913 has 2 divisors, whose sum is σ = 18200049914. Its totient is φ = 18200049912.

The previous prime is 18200049911. The next prime is 18200049953. The reversal of 18200049913 is 31994000281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9938694249 + 8261355664 = 99693^2 + 90892^2 .

It is a cyclic number.

It is not a de Polignac number, because 18200049913 - 2¹ = 18200049911 is a prime.

Together with 18200049911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18200049911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9100024956 + 9100024957.

It is an arithmetic number, because the mean of its divisors is an integer number (9100024957).

Almost surely, 2^18200049913 is an apocalyptic number.

It is an amenable number.

18200049913 is a deficient number, since it is larger than the sum of its proper divisors (1).

18200049913 is an equidigital number, since it uses as much as digits as its factorization.

18200049913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 18200049913 in words is "eighteen billion, two hundred million, forty-nine thousand, nine hundred thirteen".