19621112592 has 40 divisors (see below), whose sum is σ = 51866667424. Its totient is φ = 6388268544.

The previous prime is 19621112579. The next prime is 19621112611. The reversal of 19621112592 is 29521112691.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 19621112592.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4751113 + ... + 4755240.

Almost surely, 2^19621112592 is an apocalyptic number.

19621112592 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19621112592 is an abundant number, since it is smaller than the sum of its proper divisors (32245554832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19621112592 is a wasteful number, since it uses less digits than its factorization.

19621112592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9506407 (or 9506401 counting only the distinct ones).

The product of its digits is 19440, while the sum is 39.

Subtracting 19621112592 from its reverse (29521112691), we obtain a palindrome (9900000099).

The spelling of 19621112592 in words is "nineteen billion, six hundred twenty-one million, one hundred twelve thousand, five hundred ninety-two".