21626033441 has 2 divisors, whose sum is σ = 21626033442. Its totient is φ = 21626033440.

The previous prime is 21626033431. The next prime is 21626033477. The reversal of 21626033441 is 14433062612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19713283216 + 1912750225 = 140404^2 + 43735^2 .

It is a cyclic number.

It is not a de Polignac number, because 21626033441 - 2³⁴ = 4446164257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21626033398 and 21626033407.

It is not a weakly prime, because it can be changed into another prime (21626033431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10813016720 + 10813016721.

It is an arithmetic number, because the mean of its divisors is an integer number (10813016721).

Almost surely, 2^21626033441 is an apocalyptic number.

It is an amenable number.

21626033441 is a deficient number, since it is larger than the sum of its proper divisors (1).

21626033441 is an equidigital number, since it uses as much as digits as its factorization.

21626033441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 21626033441 in words is "twenty-one billion, six hundred twenty-six million, thirty-three thousand, four hundred forty-one".