20001673 has 8 divisors (see below), whose sum is σ = 21385728. Its totient is φ = 18640704.

The previous prime is 20001659. The next prime is 20001679. The reversal of 20001673 is 37610002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20001673 - 2⁹ = 20001161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001673.

It is not an unprimeable number, because it can be changed into a prime (20001679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3961 + ... + 7462.

It is an arithmetic number, because the mean of its divisors is an integer number (2673216).

Almost surely, 2^20001673 is an apocalyptic number.

It is an amenable number.

20001673 is a deficient number, since it is larger than the sum of its proper divisors (1384055).

20001673 is a wasteful number, since it uses less digits than its factorization.

20001673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11543.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 20001673 is about 4472.3229981744. The cubic root of 20001673 is about 271.4493301496.

Adding to 20001673 its reverse (37610002), we get a palindrome (57611675).

The spelling of 20001673 in words is "twenty million, one thousand, six hundred seventy-three".