21782536063 has 2 divisors, whose sum is σ = 21782536064. Its totient is φ = 21782536062.

The previous prime is 21782536003. The next prime is 21782536079. The reversal of 21782536063 is 36063528712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21782536063 - 2¹⁷ = 21782404991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21782536003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10891268031 + 10891268032.

It is an arithmetic number, because the mean of its divisors is an integer number (10891268032).

Almost surely, 2^21782536063 is an apocalyptic number.

21782536063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21782536063 is an equidigital number, since it uses as much as digits as its factorization.

21782536063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 21782536063 in words is "twenty-one billion, seven hundred eighty-two million, five hundred thirty-six thousand, sixty-three".