20343923 has 4 divisors (see below), whose sum is σ = 20369880. Its totient is φ = 20317968.

The previous prime is 20343893. The next prime is 20343943. The reversal of 20343923 is 32934302.

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 20343923 - 2¹⁰ = 20342899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20343892 and 20343901.

It is not an unprimeable number, because it can be changed into a prime (20343943) 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, 11765 + ... + 13382.

It is an arithmetic number, because the mean of its divisors is an integer number (5092470).

Almost surely, 2^20343923 is an apocalyptic number.

20343923 is a deficient number, since it is larger than the sum of its proper divisors (25957).

20343923 is an equidigital number, since it uses as much as digits as its factorization.

20343923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25956.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 20343923 is about 4510.4238160067. The cubic root of 20343923 is about 272.9888450495.

The spelling of 20343923 in words is "twenty million, three hundred forty-three thousand, nine hundred twenty-three".