20267536013 has 4 divisors (see below), whose sum is σ = 20270445408. Its totient is φ = 20264626620.

The previous prime is 20267536001. The next prime is 20267536019. The reversal of 20267536013 is 31063576202.

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 20267536013 - 2¹⁶ = 20267470477 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 (20267536019) 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, 1444223 + ... + 1458188.

It is an arithmetic number, because the mean of its divisors is an integer number (5067611352).

Almost surely, 2^20267536013 is an apocalyptic number.

It is an amenable number.

20267536013 is a deficient number, since it is larger than the sum of its proper divisors (2909395).

20267536013 is an equidigital number, since it uses as much as digits as its factorization.

20267536013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2909394.

The product of its (nonzero) digits is 45360, while the sum is 35.

The spelling of 20267536013 in words is "twenty billion, two hundred sixty-seven million, five hundred thirty-six thousand, thirteen".