19322772989 has 4 divisors (see below), whose sum is σ = 20809140156. Its totient is φ = 17836405824.

The previous prime is 19322772929. The next prime is 19322772991. The reversal of 19322772989 is 98927722391.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5171767225 + 14151005764 = 71915^2 + 118958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19322772989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19322772929) 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, 743183564 + ... + 743183589.

It is an arithmetic number, because the mean of its divisors is an integer number (5202285039).

Almost surely, 2^19322772989 is an apocalyptic number.

It is an amenable number.

19322772989 is a deficient number, since it is larger than the sum of its proper divisors (1486367167).

19322772989 is a wasteful number, since it uses less digits than its factorization.

19322772989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486367166.

The product of its digits is 6858432, while the sum is 59.

The spelling of 19322772989 in words is "nineteen billion, three hundred twenty-two million, seven hundred seventy-two thousand, nine hundred eighty-nine".