19485305999 has 16 divisors (see below), whose sum is σ = 20923660800. Its totient is φ = 18089094816.

The previous prime is 19485305989. The next prime is 19485306011. The reversal of 19485305999 is 99950358491.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 19485305999 - 2⁸ = 19485305743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19485305969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 833342 + ... + 856404.

It is an arithmetic number, because the mean of its divisors is an integer number (1307728800).

Almost surely, 2^19485305999 is an apocalyptic number.

19485305999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

19485305999 is a deficient number, since it is larger than the sum of its proper divisors (1438354801).

19485305999 is a wasteful number, since it uses less digits than its factorization.

19485305999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23974.

The product of its (nonzero) digits is 15746400, while the sum is 62.

The spelling of 19485305999 in words is "nineteen billion, four hundred eighty-five million, three hundred five thousand, nine hundred ninety-nine".