20436582531023 has 4 divisors (see below), whose sum is σ = 20437305134088. Its totient is φ = 20435859927960.

The previous prime is 20436582531019. The next prime is 20436582531037. The reversal of 20436582531023 is 32013528563402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20436582531023 - 2² = 20436582531019 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 (20436582561023) 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, 361259108 + ... + 361315673.

It is an arithmetic number, because the mean of its divisors is an integer number (5109326283522).

Almost surely, 2^{20436582531023} is an apocalyptic number.

20436582531023 is a deficient number, since it is larger than the sum of its proper divisors (722603065).

20436582531023 is an equidigital number, since it uses as much as digits as its factorization.

20436582531023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722603064.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 20436582531023 in words is "twenty trillion, four hundred thirty-six billion, five hundred eighty-two million, five hundred thirty-one thousand, twenty-three".