21633276442417 has 2 divisors, whose sum is σ = 21633276442418. Its totient is φ = 21633276442416.

The previous prime is 21633276442409. The next prime is 21633276442439. The reversal of 21633276442417 is 71424467233612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19163346739216 + 2469929703201 = 4377596^2 + 1571601^2 .

It is a cyclic number.

It is not a de Polignac number, because 21633276442417 - 2³ = 21633276442409 is a prime.

It is not a weakly prime, because it can be changed into another prime (21633276442447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10816638221208 + 10816638221209.

It is an arithmetic number, because the mean of its divisors is an integer number (10816638221209).

Almost surely, 2^{21633276442417} is an apocalyptic number.

It is an amenable number.

21633276442417 is a deficient number, since it is larger than the sum of its proper divisors (1).

21633276442417 is an equidigital number, since it uses as much as digits as its factorization.

21633276442417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8128512, while the sum is 52.

The spelling of 21633276442417 in words is "twenty-one trillion, six hundred thirty-three billion, two hundred seventy-six million, four hundred forty-two thousand, four hundred seventeen".