18351851899 has 2 divisors, whose sum is σ = 18351851900. Its totient is φ = 18351851898.

The previous prime is 18351851873. The next prime is 18351851953. The reversal of 18351851899 is 99815815381.

It is a weak prime.

It is an emirp because it is prime and its reverse (99815815381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18351851899 - 2⁹ = 18351851387 is a prime.

It is not a weakly prime, because it can be changed into another prime (18351851299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9175925949 + 9175925950.

It is an arithmetic number, because the mean of its divisors is an integer number (9175925950).

Almost surely, 2^18351851899 is an apocalyptic number.

18351851899 is a deficient number, since it is larger than the sum of its proper divisors (1).

18351851899 is an equidigital number, since it uses as much as digits as its factorization.

18351851899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3110400, while the sum is 58.

The spelling of 18351851899 in words is "eighteen billion, three hundred fifty-one million, eight hundred fifty-one thousand, eight hundred ninety-nine".