20404673 has 8 divisors (see below), whose sum is σ = 20791680. Its totient is φ = 20021040.

The previous prime is 20404591. The next prime is 20404679. The reversal of 20404673 is 37640402.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20404673 - 2¹² = 20400577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20404679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13586 + ... + 15012.

It is an arithmetic number, because the mean of its divisors is an integer number (2598960).

Almost surely, 2^20404673 is an apocalyptic number.

It is an amenable number.

20404673 is a deficient number, since it is larger than the sum of its proper divisors (387007).

20404673 is a wasteful number, since it uses less digits than its factorization.

20404673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1687.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 20404673 is about 4517.1531964280. The cubic root of 20404673 is about 273.2603035445.

The spelling of 20404673 in words is "twenty million, four hundred four thousand, six hundred seventy-three".