19740259999 has 2 divisors, whose sum is σ = 19740260000. Its totient is φ = 19740259998.

The previous prime is 19740259967. The next prime is 19740260003. The reversal of 19740259999 is 99995204791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19740259999 - 2⁵ = 19740259967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19740259999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19740259909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9870129999 + 9870130000.

It is an arithmetic number, because the mean of its divisors is an integer number (9870130000).

Almost surely, 2^19740259999 is an apocalyptic number.

19740259999 is a deficient number, since it is larger than the sum of its proper divisors (1).

19740259999 is an equidigital number, since it uses as much as digits as its factorization.

19740259999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16533720, while the sum is 64.

The spelling of 19740259999 in words is "nineteen billion, seven hundred forty million, two hundred fifty-nine thousand, nine hundred ninety-nine".