20933399 has 2 divisors, whose sum is σ = 20933400. Its totient is φ = 20933398.

The previous prime is 20933333. The next prime is 20933449. The reversal of 20933399 is 99333902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20933399 - 2¹⁶ = 20867863 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20933299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10466699 + 10466700.

It is an arithmetic number, because the mean of its divisors is an integer number (10466700).

Almost surely, 2^20933399 is an apocalyptic number.

20933399 is a deficient number, since it is larger than the sum of its proper divisors (1).

20933399 is an equidigital number, since it uses as much as digits as its factorization.

20933399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 38.

The square root of 20933399 is about 4575.3031593546. The cubic root of 20933399 is about 275.6004466827.

The spelling of 20933399 in words is "twenty million, nine hundred thirty-three thousand, three hundred ninety-nine".