20673823 has 2 divisors, whose sum is σ = 20673824. Its totient is φ = 20673822.

The previous prime is 20673817. The next prime is 20673859. The reversal of 20673823 is 32837602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20673823 - 2¹⁷ = 20542751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20673883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10336911 + 10336912.

It is an arithmetic number, because the mean of its divisors is an integer number (10336912).

Almost surely, 2^20673823 is an apocalyptic number.

20673823 is a deficient number, since it is larger than the sum of its proper divisors (1).

20673823 is an equidigital number, since it uses as much as digits as its factorization.

20673823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 20673823 is about 4546.8475892645. The cubic root of 20673823 is about 274.4565487852.

The spelling of 20673823 in words is "twenty million, six hundred seventy-three thousand, eight hundred twenty-three".