21782000927 has 2 divisors, whose sum is σ = 21782000928. Its totient is φ = 21782000926.

The previous prime is 21782000861. The next prime is 21782000951. The reversal of 21782000927 is 72900028712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21782000927 - 2⁸ = 21782000671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21782000627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10891000463 + 10891000464.

It is an arithmetic number, because the mean of its divisors is an integer number (10891000464).

Almost surely, 2^21782000927 is an apocalyptic number.

21782000927 is a deficient number, since it is larger than the sum of its proper divisors (1).

21782000927 is an equidigital number, since it uses as much as digits as its factorization.

21782000927 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 38.

The spelling of 21782000927 in words is "twenty-one billion, seven hundred eighty-two million, nine hundred twenty-seven", and thus it is an aban number.