19722613394 has 8 divisors (see below), whose sum is σ = 32273367408. Its totient is φ = 8964824260.

The previous prime is 19722613381. The next prime is 19722613441. The reversal of 19722613394 is 49331622791.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448241192 + ... + 448241235.

It is an arithmetic number, because the mean of its divisors is an integer number (4034170926).

Almost surely, 2^19722613394 is an apocalyptic number.

19722613394 is a deficient number, since it is larger than the sum of its proper divisors (12550754014).

19722613394 is a wasteful number, since it uses less digits than its factorization.

19722613394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896482440.

The product of its digits is 489888, while the sum is 47.

The spelling of 19722613394 in words is "nineteen billion, seven hundred twenty-two million, six hundred thirteen thousand, three hundred ninety-four".