20836633 has 2 divisors, whose sum is σ = 20836634. Its totient is φ = 20836632.

The previous prime is 20836631. The next prime is 20836657. The reversal of 20836633 is 33663802.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10673289 + 10163344 = 3267^2 + 3188^2 .

It is a cyclic number.

It is not a de Polignac number, because 20836633 - 2¹ = 20836631 is a prime.

Together with 20836631, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20836595 and 20836604.

It is not a weakly prime, because it can be changed into another prime (20836631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10418316 + 10418317.

It is an arithmetic number, because the mean of its divisors is an integer number (10418317).

Almost surely, 2^20836633 is an apocalyptic number.

It is an amenable number.

20836633 is a deficient number, since it is larger than the sum of its proper divisors (1).

20836633 is an equidigital number, since it uses as much as digits as its factorization.

20836633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 20836633 is about 4564.7160919382. The cubic root of 20836633 is about 275.1751303200.

The spelling of 20836633 in words is "twenty million, eight hundred thirty-six thousand, six hundred thirty-three".