19505100497 has 4 divisors (see below), whose sum is σ = 19530334260. Its totient is φ = 19479866736.

The previous prime is 19505100491. The next prime is 19505100499. The reversal of 19505100497 is 79400150591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3448155841 + 16056944656 = 58721^2 + 126716^2 .

It is a cyclic number.

It is not a de Polignac number, because 19505100497 - 2¹⁶ = 19505034961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19505100491) 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, 12615722 + ... + 12617267.

It is an arithmetic number, because the mean of its divisors is an integer number (4882583565).

Almost surely, 2^19505100497 is an apocalyptic number.

It is an amenable number.

19505100497 is a deficient number, since it is larger than the sum of its proper divisors (25233763).

19505100497 is an equidigital number, since it uses as much as digits as its factorization.

19505100497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25233762.

The product of its (nonzero) digits is 56700, while the sum is 41.

The spelling of 19505100497 in words is "nineteen billion, five hundred five million, one hundred thousand, four hundred ninety-seven".