20404573 has 8 divisors (see below), whose sum is σ = 24691392. Its totient is φ = 16460736.

The previous prime is 20404567. The next prime is 20404577. The reversal of 20404573 is 37540402.

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 20404573 - 2¹³ = 20396381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85615 + ... + 85852.

It is an arithmetic number, because the mean of its divisors is an integer number (3086424).

Almost surely, 2^20404573 is an apocalyptic number.

It is an amenable number.

20404573 is a deficient number, since it is larger than the sum of its proper divisors (4286819).

20404573 is a wasteful number, since it uses less digits than its factorization.

20404573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171491.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 20404573 is about 4517.1421274961. The cubic root of 20404573 is about 273.2598571423.

Adding to 20404573 its reverse (37540402), we get a palindrome (57944975).

The spelling of 20404573 in words is "twenty million, four hundred four thousand, five hundred seventy-three".