20892026647 has 4 divisors (see below), whose sum is σ = 20892322696. Its totient is φ = 20891730600.

The previous prime is 20892026629. The next prime is 20892026663. The reversal of 20892026647 is 74662029802.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20892026647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20892026597 and 20892026606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20892026047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26128 + ... + 206074.

It is an arithmetic number, because the mean of its divisors is an integer number (5223080674).

Almost surely, 2^20892026647 is an apocalyptic number.

20892026647 is a deficient number, since it is larger than the sum of its proper divisors (296049).

20892026647 is a wasteful number, since it uses less digits than its factorization.

20892026647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296048.

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 20892026647 in words is "twenty billion, eight hundred ninety-two million, twenty-six thousand, six hundred forty-seven".