20863339843 has 2 divisors, whose sum is σ = 20863339844. Its totient is φ = 20863339842.

The previous prime is 20863339831. The next prime is 20863339883. The reversal of 20863339843 is 34893336802.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20863339843 - 2⁹ = 20863339331 is a prime.

It is a super-2 number, since 2×20863339843² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20863339883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10431669921 + 10431669922.

It is an arithmetic number, because the mean of its divisors is an integer number (10431669922).

Almost surely, 2^20863339843 is an apocalyptic number.

20863339843 is a deficient number, since it is larger than the sum of its proper divisors (1).

20863339843 is an equidigital number, since it uses as much as digits as its factorization.

20863339843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 49.

The spelling of 20863339843 in words is "twenty billion, eight hundred sixty-three million, three hundred thirty-nine thousand, eight hundred forty-three".