19220019391 has 8 divisors (see below), whose sum is σ = 20112495840. Its totient is φ = 18332278272.

The previous prime is 19220019389. The next prime is 19220019397. The reversal of 19220019391 is 19391002291.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 19220019391 - 2¹ = 19220019389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19220019391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19220019397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1175526 + ... + 1191763.

It is an arithmetic number, because the mean of its divisors is an integer number (2514061980).

Almost surely, 2^19220019391 is an apocalyptic number.

19220019391 is a deficient number, since it is larger than the sum of its proper divisors (892476449).

19220019391 is a wasteful number, since it uses less digits than its factorization.

19220019391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2367665.

The product of its (nonzero) digits is 8748, while the sum is 37.

The spelling of 19220019391 in words is "nineteen billion, two hundred twenty million, nineteen thousand, three hundred ninety-one".