20576206349 has 4 divisors (see below), whose sum is σ = 20610905436. Its totient is φ = 20541507264.

The previous prime is 20576206337. The next prime is 20576206397. The reversal of 20576206349 is 94360267502.

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 17669055625 + 2907150724 = 132925^2 + 53918^2 .

It is a cyclic number.

It is not a de Polignac number, because 20576206349 - 2²⁴ = 20559429133 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 (20576266349) 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, 17348654 + ... + 17349839.

It is an arithmetic number, because the mean of its divisors is an integer number (5152726359).

Almost surely, 2^20576206349 is an apocalyptic number.

It is an amenable number.

20576206349 is a deficient number, since it is larger than the sum of its proper divisors (34699087).

20576206349 is an equidigital number, since it uses as much as digits as its factorization.

20576206349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34699086.

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 20576206349 in words is "twenty billion, five hundred seventy-six million, two hundred six thousand, three hundred forty-nine".