20867023 has 2 divisors, whose sum is σ = 20867024. Its totient is φ = 20867022.

The previous prime is 20866969. The next prime is 20867039. The reversal of 20867023 is 32076802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20867023 - 2⁹ = 20866511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20866982 and 20867000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20367023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10433511 + 10433512.

It is an arithmetic number, because the mean of its divisors is an integer number (10433512).

Almost surely, 2^20867023 is an apocalyptic number.

20867023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20867023 is an equidigital number, since it uses as much as digits as its factorization.

20867023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20867023 is about 4568.0436731713. The cubic root of 20867023 is about 275.3088453006.

The spelling of 20867023 in words is "twenty million, eight hundred sixty-seven thousand, twenty-three".