19389290691 has 8 divisors (see below), whose sum is σ = 26453606080. Its totient is φ = 12625584552.

The previous prime is 19389290663. The next prime is 19389290729. The reversal of 19389290691 is 19609298391.

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

It is not a de Polignac number, because 19389290691 - 2¹¹ = 19389288643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19389990691) 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, 75152161 + ... + 75152418.

It is an arithmetic number, because the mean of its divisors is an integer number (3306700760).

Almost surely, 2^19389290691 is an apocalyptic number.

19389290691 is a deficient number, since it is larger than the sum of its proper divisors (7064315389).

19389290691 is a wasteful number, since it uses less digits than its factorization.

19389290691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150304625.

The product of its (nonzero) digits is 1889568, while the sum is 57.

The spelling of 19389290691 in words is "nineteen billion, three hundred eighty-nine million, two hundred ninety thousand, six hundred ninety-one".