20939267 has 2 divisors, whose sum is σ = 20939268. Its totient is φ = 20939266.

The previous prime is 20939263. The next prime is 20939279. The reversal of 20939267 is 76293902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20939267 - 2² = 20939263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20939267.

It is not a weakly prime, because it can be changed into another prime (20939263) 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, 10469633 + 10469634.

It is an arithmetic number, because the mean of its divisors is an integer number (10469634).

Almost surely, 2^20939267 is an apocalyptic number.

20939267 is a deficient number, since it is larger than the sum of its proper divisors (1).

20939267 is an equidigital number, since it uses as much as digits as its factorization.

20939267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 20939267 is about 4575.9443834033. The cubic root of 20939267 is about 275.6261961614.

The spelling of 20939267 in words is "twenty million, nine hundred thirty-nine thousand, two hundred sixty-seven".