19641598453 has 4 divisors (see below), whose sum is σ = 19645737408. Its totient is φ = 19637459500.

The previous prime is 19641598451. The next prime is 19641598469. The reversal of 19641598453 is 35489514691.

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 19641598453 - 2¹ = 19641598451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19641598394 and 19641598403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19641598451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2062351 + ... + 2071852.

It is an arithmetic number, because the mean of its divisors is an integer number (4911434352).

Almost surely, 2^19641598453 is an apocalyptic number.

It is an amenable number.

19641598453 is a deficient number, since it is larger than the sum of its proper divisors (4138955).

19641598453 is an equidigital number, since it uses as much as digits as its factorization.

19641598453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138954.

The product of its digits is 4665600, while the sum is 55.

The spelling of 19641598453 in words is "nineteen billion, six hundred forty-one million, five hundred ninety-eight thousand, four hundred fifty-three".