20044454407253 has 4 divisors (see below), whose sum is σ = 20044464626208. Its totient is φ = 20044444188300.

The previous prime is 20044454407181. The next prime is 20044454407337. The reversal of 20044454407253 is 35270445444002.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20044454407253 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 (20044454400253) 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, 1138523 + ... + 6433128.

It is an arithmetic number, because the mean of its divisors is an integer number (5011116156552).

Almost surely, 2^{20044454407253} is an apocalyptic number.

It is an amenable number.

20044454407253 is a deficient number, since it is larger than the sum of its proper divisors (10218955).

20044454407253 is an equidigital number, since it uses as much as digits as its factorization.

20044454407253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10218954.

The product of its (nonzero) digits is 2150400, while the sum is 44.

The spelling of 20044454407253 in words is "twenty trillion, forty-four billion, four hundred fifty-four million, four hundred seven thousand, two hundred fifty-three".