20833460647 has 2 divisors, whose sum is σ = 20833460648. Its totient is φ = 20833460646.

The previous prime is 20833460623. The next prime is 20833460663. The reversal of 20833460647 is 74606433802.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20833460647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20833460047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10416730323 + 10416730324.

It is an arithmetic number, because the mean of its divisors is an integer number (10416730324).

Almost surely, 2^20833460647 is an apocalyptic number.

20833460647 is a deficient number, since it is larger than the sum of its proper divisors (1).

20833460647 is an equidigital number, since it uses as much as digits as its factorization.

20833460647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 43.

The spelling of 20833460647 in words is "twenty billion, eight hundred thirty-three million, four hundred sixty thousand, six hundred forty-seven".