20894633 has 2 divisors, whose sum is σ = 20894634. Its totient is φ = 20894632.

The previous prime is 20894617. The next prime is 20894641. The reversal of 20894633 is 33649802.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18593344 + 2301289 = 4312^2 + 1517^2 .

It is a cyclic number.

It is not a de Polignac number, because 20894633 - 2⁴ = 20894617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20894593 and 20894602.

It is not a weakly prime, because it can be changed into another prime (20894663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10447316 + 10447317.

It is an arithmetic number, because the mean of its divisors is an integer number (10447317).

Almost surely, 2^20894633 is an apocalyptic number.

It is an amenable number.

20894633 is a deficient number, since it is larger than the sum of its proper divisors (1).

20894633 is an equidigital number, since it uses as much as digits as its factorization.

20894633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 20894633 is about 4571.0647556122. The cubic root of 20894633 is about 275.4302158663.

The spelling of 20894633 in words is "twenty million, eight hundred ninety-four thousand, six hundred thirty-three".