19455912899 has 4 divisors (see below), whose sum is σ = 19456263264. Its totient is φ = 19455562536.

The previous prime is 19455912893. The next prime is 19455912919. The reversal of 19455912899 is 99821955491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19455912899 - 2²⁰ = 19454864323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19455912893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71387 + ... + 209780.

It is an arithmetic number, because the mean of its divisors is an integer number (4864065816).

Almost surely, 2^19455912899 is an apocalyptic number.

19455912899 is a deficient number, since it is larger than the sum of its proper divisors (350365).

19455912899 is an equidigital number, since it uses as much as digits as its factorization.

19455912899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350364.

The product of its digits is 10497600, while the sum is 62.

The spelling of 19455912899 in words is "nineteen billion, four hundred fifty-five million, nine hundred twelve thousand, eight hundred ninety-nine".