21354617106583 has 2 divisors, whose sum is σ = 21354617106584. Its totient is φ = 21354617106582.

The previous prime is 21354617106577. The next prime is 21354617106643. The reversal of 21354617106583 is 38560171645312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21354617106583 - 2²⁹ = 21354080235671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21354617106583.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21354617106503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10677308553291 + 10677308553292.

It is an arithmetic number, because the mean of its divisors is an integer number (10677308553292).

Almost surely, 2^{21354617106583} is an apocalyptic number.

21354617106583 is a deficient number, since it is larger than the sum of its proper divisors (1).

21354617106583 is an equidigital number, since it uses as much as digits as its factorization.

21354617106583 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 21354617106583 in words is "twenty-one trillion, three hundred fifty-four billion, six hundred seventeen million, one hundred six thousand, five hundred eighty-three".