19026970917 has 4 divisors (see below), whose sum is σ = 25369294560. Its totient is φ = 12684647276.

The previous prime is 19026970889. The next prime is 19026970927. The reversal of 19026970917 is 71907962091.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19026970917 - 2³⁰ = 17953229093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19026970917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19026970927) 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, 3171161817 + ... + 3171161822.

It is an arithmetic number, because the mean of its divisors is an integer number (6342323640).

Almost surely, 2^19026970917 is an apocalyptic number.

It is an amenable number.

19026970917 is a deficient number, since it is larger than the sum of its proper divisors (6342323643).

19026970917 is an equidigital number, since it uses as much as digits as its factorization.

19026970917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6342323642.

The product of its (nonzero) digits is 428652, while the sum is 51.

The spelling of 19026970917 in words is "nineteen billion, twenty-six million, nine hundred seventy thousand, nine hundred seventeen".