20352505 has 8 divisors (see below), whose sum is σ = 24767424. Its totient is φ = 16052400.

The previous prime is 20352503. The next prime is 20352509. The reversal of 20352505 is 50525302.

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

It is not a de Polignac number, because 20352505 - 2¹ = 20352503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20352503) 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, 28311 + ... + 29020.

It is an arithmetic number, because the mean of its divisors is an integer number (3095928).

Almost surely, 2^20352505 is an apocalyptic number.

It is an amenable number.

20352505 is a deficient number, since it is larger than the sum of its proper divisors (4414919).

20352505 is an equidigital number, since it uses as much as digits as its factorization.

20352505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57407.

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 20352505 is about 4511.3750675376. The cubic root of 20352505 is about 273.0272260592.

Adding to 20352505 its reverse (50525302), we get a palindrome (70877807).

The spelling of 20352505 in words is "twenty million, three hundred fifty-two thousand, five hundred five".