21280876583 has 2 divisors, whose sum is σ = 21280876584. Its totient is φ = 21280876582.

The previous prime is 21280876571. The next prime is 21280876637. The reversal of 21280876583 is 38567808212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21280876583 - 2¹⁰ = 21280875559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21280876543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10640438291 + 10640438292.

It is an arithmetic number, because the mean of its divisors is an integer number (10640438292).

Almost surely, 2^21280876583 is an apocalyptic number.

21280876583 is a deficient number, since it is larger than the sum of its proper divisors (1).

21280876583 is an equidigital number, since it uses as much as digits as its factorization.

21280876583 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 21280876583 in words is "twenty-one billion, two hundred eighty million, eight hundred seventy-six thousand, five hundred eighty-three".