21782453047 has 2 divisors, whose sum is σ = 21782453048. Its totient is φ = 21782453046.

The previous prime is 21782453041. The next prime is 21782453057. The reversal of 21782453047 is 74035428712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21782453047 - 2¹⁵ = 21782420279 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21782452994 and 21782453012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21782453041) 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, 10891226523 + 10891226524.

It is an arithmetic number, because the mean of its divisors is an integer number (10891226524).

Almost surely, 2^21782453047 is an apocalyptic number.

21782453047 is a deficient number, since it is larger than the sum of its proper divisors (1).

21782453047 is an equidigital number, since it uses as much as digits as its factorization.

21782453047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 376320, while the sum is 43.

The spelling of 21782453047 in words is "twenty-one billion, seven hundred eighty-two million, four hundred fifty-three thousand, forty-seven".