20867933 has 2 divisors, whose sum is σ = 20867934. Its totient is φ = 20867932.

The previous prime is 20867911. The next prime is 20867971. The reversal of 20867933 is 33976802.

It is an a-pointer prime, because the next prime (20867971) can be obtained adding 20867933 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17322244 + 3545689 = 4162^2 + 1883^2 .

It is a cyclic number.

It is not a de Polignac number, because 20867933 - 2¹⁴ = 20851549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20867983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10433966 + 10433967.

It is an arithmetic number, because the mean of its divisors is an integer number (10433967).

Almost surely, 2^20867933 is an apocalyptic number.

It is an amenable number.

20867933 is a deficient number, since it is larger than the sum of its proper divisors (1).

20867933 is an equidigital number, since it uses as much as digits as its factorization.

20867933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 20867933 is about 4568.1432770875. The cubic root of 20867933 is about 275.3128472675.

The spelling of 20867933 in words is "twenty million, eight hundred sixty-seven thousand, nine hundred thirty-three".