19475398505 has 8 divisors (see below), whose sum is σ = 23405208072. Its totient is φ = 15557165568.

The previous prime is 19475398493. The next prime is 19475398571. The reversal of 19475398505 is 50589357491.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4732339264 + 14743059241 = 68792^2 + 121421^2 .

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 19475398505 - 2²⁸ = 19206963049 is a prime.

It is a super-2 number, since 2×19475398505² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2890454 + ... + 2897183.

It is an arithmetic number, because the mean of its divisors is an integer number (2925651009).

Almost surely, 2^19475398505 is an apocalyptic number.

It is an amenable number.

19475398505 is a deficient number, since it is larger than the sum of its proper divisors (3929809567).

19475398505 is an equidigital number, since it uses as much as digits as its factorization.

19475398505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5788315.

The product of its (nonzero) digits is 6804000, while the sum is 56.

The spelling of 19475398505 in words is "nineteen billion, four hundred seventy-five million, three hundred ninety-eight thousand, five hundred five".