18988200499 has 2 divisors, whose sum is σ = 18988200500. Its totient is φ = 18988200498.

The previous prime is 18988200437. The next prime is 18988200509. The reversal of 18988200499 is 99400288981.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18988200499 is a prime.

It is not a weakly prime, because it can be changed into another prime (18988200409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9494100249 + 9494100250.

It is an arithmetic number, because the mean of its divisors is an integer number (9494100250).

Almost surely, 2^18988200499 is an apocalyptic number.

18988200499 is a deficient number, since it is larger than the sum of its proper divisors (1).

18988200499 is an equidigital number, since it uses as much as digits as its factorization.

18988200499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2985984, while the sum is 58.

The spelling of 18988200499 in words is "eighteen billion, nine hundred eighty-eight million, two hundred thousand, four hundred ninety-nine".