21876276269 has 2 divisors, whose sum is σ = 21876276270. Its totient is φ = 21876276268.

The previous prime is 21876276263. The next prime is 21876276283. The reversal of 21876276269 is 96267267812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17592573769 + 4283702500 = 132637^2 + 65450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21876276269 is a prime.

It is a super-2 number, since 2×21876276269² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21876276263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10938138134 + 10938138135.

It is an arithmetic number, because the mean of its divisors is an integer number (10938138135).

Almost surely, 2^21876276269 is an apocalyptic number.

It is an amenable number.

21876276269 is a deficient number, since it is larger than the sum of its proper divisors (1).

21876276269 is an equidigital number, since it uses as much as digits as its factorization.

21876276269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 56.

The spelling of 21876276269 in words is "twenty-one billion, eight hundred seventy-six million, two hundred seventy-six thousand, two hundred sixty-nine".