20266254013 has 4 divisors (see below), whose sum is σ = 21458386620. Its totient is φ = 19074121408.

The previous prime is 20266254011. The next prime is 20266254079. The reversal of 20266254013 is 31045266202.

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 14949219289 + 5317034724 = 122267^2 + 72918^2 .

It is a cyclic number.

It is not a de Polignac number, because 20266254013 - 2¹ = 20266254011 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 (20266254011) 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, 596066278 + ... + 596066311.

It is an arithmetic number, because the mean of its divisors is an integer number (5364596655).

Almost surely, 2^20266254013 is an apocalyptic number.

It is an amenable number.

20266254013 is a deficient number, since it is larger than the sum of its proper divisors (1192132607).

20266254013 is a wasteful number, since it uses less digits than its factorization.

20266254013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192132606.

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 20266254013 in words is "twenty billion, two hundred sixty-six million, two hundred fifty-four thousand, thirteen".