18927953999 has 2 divisors, whose sum is σ = 18927954000. Its totient is φ = 18927953998.

The previous prime is 18927953987. The next prime is 18927954013. The reversal of 18927953999 is 99935972981.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18927953999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18927953909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9463976999 + 9463977000.

It is an arithmetic number, because the mean of its divisors is an integer number (9463977000).

Almost surely, 2^18927953999 is an apocalyptic number.

18927953999 is a deficient number, since it is larger than the sum of its proper divisors (1).

18927953999 is an equidigital number, since it uses as much as digits as its factorization.

18927953999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 99202320, while the sum is 71.

The spelling of 18927953999 in words is "eighteen billion, nine hundred twenty-seven million, nine hundred fifty-three thousand, nine hundred ninety-nine".