20591474503109 has 4 divisors (see below), whose sum is σ = 20591850321600. Its totient is φ = 20591098684620.

The previous prime is 20591474503097. The next prime is 20591474503147. The reversal of 20591474503109 is 90130547419502.

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 20591474503109 - 2³⁶ = 20522755026373 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 (20591474503709) 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, 187827047 + ... + 187936644.

It is an arithmetic number, because the mean of its divisors is an integer number (5147962580400).

Almost surely, 2^{20591474503109} is an apocalyptic number.

It is an amenable number.

20591474503109 is a deficient number, since it is larger than the sum of its proper divisors (375818491).

20591474503109 is an equidigital number, since it uses as much as digits as its factorization.

20591474503109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375818490.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 20591474503109 in words is "twenty trillion, five hundred ninety-one billion, four hundred seventy-four million, five hundred three thousand, one hundred nine".