19265090497 has 4 divisors (see below), whose sum is σ = 19280107440. Its totient is φ = 19250073556.

The previous prime is 19265090491. The next prime is 19265090519. The reversal of 19265090497 is 79409056291.

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 a de Polignac number, because none of the positive numbers 2^k-19265090497 is a prime.

It is a super-2 number, since 2×19265090497² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19265090491) 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, 7506547 + ... + 7509112.

It is an arithmetic number, because the mean of its divisors is an integer number (4820026860).

Almost surely, 2^19265090497 is an apocalyptic number.

It is an amenable number.

19265090497 is a deficient number, since it is larger than the sum of its proper divisors (15016943).

19265090497 is a wasteful number, since it uses less digits than its factorization.

19265090497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15016942.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 19265090497 in words is "nineteen billion, two hundred sixty-five million, ninety thousand, four hundred ninety-seven".