20896932709 has 4 divisors (see below), whose sum is σ = 20904002604. Its totient is φ = 20889862816.

The previous prime is 20896932703. The next prime is 20896932731. The reversal of 20896932709 is 90723969802.

It is a happy number.

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 6237050625 + 14659882084 = 78975^2 + 121078^2 .

It is a cyclic number.

It is not a de Polignac number, because 20896932709 - 2³ = 20896932701 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 20896932709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20896932701) 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, 3530512 + ... + 3536425.

It is an arithmetic number, because the mean of its divisors is an integer number (5226000651).

Almost surely, 2^20896932709 is an apocalyptic number.

It is an amenable number.

20896932709 is a deficient number, since it is larger than the sum of its proper divisors (7069895).

20896932709 is an equidigital number, since it uses as much as digits as its factorization.

20896932709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7069894.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 20896932709 in words is "twenty billion, eight hundred ninety-six million, nine hundred thirty-two thousand, seven hundred nine".