20007706613 has 4 divisors (see below), whose sum is σ = 20010720588. Its totient is φ = 20004692640.

The previous prime is 20007706603. The next prime is 20007706639. The reversal of 20007706613 is 31660770002.

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 2763289489 + 17244417124 = 52567^2 + 131318^2 .

It is a cyclic number.

It is not a de Polignac number, because 20007706613 - 2⁴ = 20007706597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20007706613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20007706603) 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, 1497008 + ... + 1510313.

It is an arithmetic number, because the mean of its divisors is an integer number (5002680147).

Almost surely, 2^20007706613 is an apocalyptic number.

It is an amenable number.

20007706613 is a deficient number, since it is larger than the sum of its proper divisors (3013975).

20007706613 is an equidigital number, since it uses as much as digits as its factorization.

20007706613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3013974.

The product of its (nonzero) digits is 10584, while the sum is 32.

The spelling of 20007706613 in words is "twenty billion, seven million, seven hundred six thousand, six hundred thirteen".