20673123 has 4 divisors (see below), whose sum is σ = 27564168. Its totient is φ = 13782080.

The previous prime is 20673101. The next prime is 20673131. The reversal of 20673123 is 32137602.

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 20673123 - 2¹² = 20669027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20673093 and 20673102.

It is not an unprimeable number, because it can be changed into a prime (20673193) 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, 3445518 + ... + 3445523.

It is an arithmetic number, because the mean of its divisors is an integer number (6891042).

Almost surely, 2^20673123 is an apocalyptic number.

20673123 is a deficient number, since it is larger than the sum of its proper divisors (6891045).

20673123 is an equidigital number, since it uses as much as digits as its factorization.

20673123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6891044.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 20673123 is about 4546.7706122038. The cubic root of 20673123 is about 274.4534511199.

The spelling of 20673123 in words is "twenty million, six hundred seventy-three thousand, one hundred twenty-three".