20933623 has 2 divisors, whose sum is σ = 20933624. Its totient is φ = 20933622.

The previous prime is 20933603. The next prime is 20933629. The reversal of 20933623 is 32633902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20933623 - 2⁹ = 20933111 is a prime.

It is a super-2 number, since 2×20933623² = 876433143812258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20933591 and 20933600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20933629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10466811 + 10466812.

It is an arithmetic number, because the mean of its divisors is an integer number (10466812).

Almost surely, 2^20933623 is an apocalyptic number.

20933623 is a deficient number, since it is larger than the sum of its proper divisors (1).

20933623 is an equidigital number, since it uses as much as digits as its factorization.

20933623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 28.

The square root of 20933623 is about 4575.3276385413. The cubic root of 20933623 is about 275.6014297095.

It can be divided in two parts, 209 and 33623, that multiplied together give a palindrome (7027207).

The spelling of 20933623 in words is "twenty million, nine hundred thirty-three thousand, six hundred twenty-three".