21852786763 has 2 divisors, whose sum is σ = 21852786764. Its totient is φ = 21852786762.

The previous prime is 21852786737. The next prime is 21852786773. The reversal of 21852786763 is 36768725812.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21852786763 is a prime.

It is not a weakly prime, because it can be changed into another prime (21852786733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10926393381 + 10926393382.

It is an arithmetic number, because the mean of its divisors is an integer number (10926393382).

Almost surely, 2^21852786763 is an apocalyptic number.

21852786763 is a deficient number, since it is larger than the sum of its proper divisors (1).

21852786763 is an equidigital number, since it uses as much as digits as its factorization.

21852786763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6773760, while the sum is 55.

The spelling of 21852786763 in words is "twenty-one billion, eight hundred fifty-two million, seven hundred eighty-six thousand, seven hundred sixty-three".