20504173 has 8 divisors (see below), whose sum is σ = 22043520. Its totient is φ = 19010880.

The previous prime is 20504171. The next prime is 20504177. The reversal of 20504173 is 37140502.

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 20504173 - 2¹ = 20504171 is a prime.

It is a super-2 number, since 2×20504173² = 840842220827858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20504171) 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, 10588 + ... + 12373.

It is an arithmetic number, because the mean of its divisors is an integer number (2755440).

Almost surely, 2^20504173 is an apocalyptic number.

It is an amenable number.

20504173 is a deficient number, since it is larger than the sum of its proper divisors (1539347).

20504173 is a wasteful number, since it uses less digits than its factorization.

20504173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23027.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20504173 is about 4528.1533763776. The cubic root of 20504173 is about 273.7037530210.

Adding to 20504173 its reverse (37140502), we get a palindrome (57644675).

The spelling of 20504173 in words is "twenty million, five hundred four thousand, one hundred seventy-three".