20031673 has 4 divisors (see below), whose sum is σ = 20677888. Its totient is φ = 19385460.

The previous prime is 20031667. The next prime is 20031701. The reversal of 20031673 is 37613002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20031673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20031173) 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, 323061 + ... + 323122.

It is an arithmetic number, because the mean of its divisors is an integer number (5169472).

Almost surely, 2^20031673 is an apocalyptic number.

It is an amenable number.

20031673 is a deficient number, since it is larger than the sum of its proper divisors (646215).

20031673 is an equidigital number, since it uses as much as digits as its factorization.

20031673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646214.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 20031673 is about 4475.6757031760. The cubic root of 20031673 is about 271.5849756677.

Adding to 20031673 its reverse (37613002), we get a palindrome (57644675).

The spelling of 20031673 in words is "twenty million, thirty-one thousand, six hundred seventy-three".