21082777343 has 2 divisors, whose sum is σ = 21082777344. Its totient is φ = 21082777342.

The previous prime is 21082777327. The next prime is 21082777351. The reversal of 21082777343 is 34377728012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21082777343 - 2⁴ = 21082777327 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21082777294 and 21082777303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21082777043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10541388671 + 10541388672.

It is an arithmetic number, because the mean of its divisors is an integer number (10541388672).

Almost surely, 2^21082777343 is an apocalyptic number.

21082777343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21082777343 is an equidigital number, since it uses as much as digits as its factorization.

21082777343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 44.

The spelling of 21082777343 in words is "twenty-one billion, eighty-two million, seven hundred seventy-seven thousand, three hundred forty-three".