20500777347 has 4 divisors (see below), whose sum is σ = 27334369800. Its totient is φ = 13667184896.

The previous prime is 20500777327. The next prime is 20500777361. The reversal of 20500777347 is 74377700502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20500777347 - 2²² = 20496583043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20500777299 and 20500777308.

It is not an unprimeable number, because it can be changed into a prime (20500777327) 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, 3416796222 + ... + 3416796227.

It is an arithmetic number, because the mean of its divisors is an integer number (6833592450).

Almost surely, 2^20500777347 is an apocalyptic number.

20500777347 is a deficient number, since it is larger than the sum of its proper divisors (6833592453).

20500777347 is an equidigital number, since it uses as much as digits as its factorization.

20500777347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6833592452.

The product of its (nonzero) digits is 288120, while the sum is 42.

The spelling of 20500777347 in words is "twenty billion, five hundred million, seven hundred seventy-seven thousand, three hundred forty-seven".