21782536003 has 2 divisors, whose sum is σ = 21782536004. Its totient is φ = 21782536002.

The previous prime is 21782535967. The next prime is 21782536063. The reversal of 21782536003 is 30063528712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21782536003 - 2²⁵ = 21748981571 is a prime.

It is not a weakly prime, because it can be changed into another prime (21782536063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10891268001 + 10891268002.

It is an arithmetic number, because the mean of its divisors is an integer number (10891268002).

Almost surely, 2^21782536003 is an apocalyptic number.

21782536003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21782536003 is an equidigital number, since it uses as much as digits as its factorization.

21782536003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

It can be divided in two parts, 217825 and 36003, that added together give a triangular number (253828 = T₇₁₂).

The spelling of 21782536003 in words is "twenty-one billion, seven hundred eighty-two million, five hundred thirty-six thousand, three".