20056263613 has 4 divisors (see below), whose sum is σ = 20747858940. Its totient is φ = 19364668288.

The previous prime is 20056263607. The next prime is 20056263631. The reversal of 20056263613 is 31636265002.

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 6498455769 + 13557807844 = 80613^2 + 116438^2 .

It is a cyclic number.

It is not a de Polignac number, because 20056263613 - 2⁵ = 20056263581 is a prime.

It is a super-2 number, since 2×20056263613² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20056203613) 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, 345797620 + ... + 345797677.

It is an arithmetic number, because the mean of its divisors is an integer number (5186964735).

Almost surely, 2^20056263613 is an apocalyptic number.

It is an amenable number.

20056263613 is a deficient number, since it is larger than the sum of its proper divisors (691595327).

20056263613 is an equidigital number, since it uses as much as digits as its factorization.

20056263613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691595326.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 20056263613 in words is "twenty billion, fifty-six million, two hundred sixty-three thousand, six hundred thirteen".