20679195859453 has 4 divisors (see below), whose sum is σ = 20679378166908. Its totient is φ = 20679013552000.

The previous prime is 20679195859429. The next prime is 20679195859537. The reversal of 20679195859453 is 35495859197602.

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 11627022464964 + 9052173394489 = 3409842^2 + 3008683^2 .

It is a cyclic number.

It is not a de Polignac number, because 20679195859453 - 2²⁹ = 20678658988541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20679193859453) 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, 90983476 + ... + 91210477.

It is an arithmetic number, because the mean of its divisors is an integer number (5169844541727).

It is a 1-persistent number, because it is pandigital, but 2⋅20679195859453 = 41358391718906 is not.

Almost surely, 2^{20679195859453} is an apocalyptic number.

It is an amenable number.

20679195859453 is a deficient number, since it is larger than the sum of its proper divisors (182307455).

20679195859453 is a wasteful number, since it uses less digits than its factorization.

20679195859453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182307454.

The product of its (nonzero) digits is 734832000, while the sum is 73.

The spelling of 20679195859453 in words is "twenty trillion, six hundred seventy-nine billion, one hundred ninety-five million, eight hundred fifty-nine thousand, four hundred fifty-three".