20504371 has 8 divisors (see below), whose sum is σ = 20861120. Its totient is φ = 20150208.

The previous prime is 20504353. The next prime is 20504377. The reversal of 20504371 is 17340502.

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 20504371 - 2¹⁵ = 20471603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20504377) 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, 21415 + ... + 22351.

It is an arithmetic number, because the mean of its divisors is an integer number (2607640).

Almost surely, 2^20504371 is an apocalyptic number.

20504371 is a deficient number, since it is larger than the sum of its proper divisors (356749).

20504371 is an equidigital number, since it uses as much as digits as its factorization.

20504371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293.

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

The square root of 20504371 is about 4528.1752395419. The cubic root of 20504371 is about 273.7046340314.

Adding to 20504371 its reverse (17340502), we get a palindrome (37844873).

The spelling of 20504371 in words is "twenty million, five hundred four thousand, three hundred seventy-one".