20694923 has 4 divisors (see below), whose sum is σ = 20717208. Its totient is φ = 20672640.

The previous prime is 20694901. The next prime is 20694937. The reversal of 20694923 is 32949602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20694923 - 2¹² = 20690827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20694943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9686 + ... + 11627.

It is an arithmetic number, because the mean of its divisors is an integer number (5179302).

Almost surely, 2^20694923 is an apocalyptic number.

20694923 is a deficient number, since it is larger than the sum of its proper divisors (22285).

20694923 is an equidigital number, since it uses as much as digits as its factorization.

20694923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22284.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 20694923 is about 4549.1672864383. The cubic root of 20694923 is about 274.5498884666.

The spelling of 20694923 in words is "twenty million, six hundred ninety-four thousand, nine hundred twenty-three".