20732005 has 8 divisors (see below), whose sum is σ = 28432512. Its totient is φ = 14216208.

The previous prime is 20732003. The next prime is 20732051. The reversal of 20732005 is 50023702.

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 20732005 - 2¹ = 20732003 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 (20732003) 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, 296137 + ... + 296206.

It is an arithmetic number, because the mean of its divisors is an integer number (3554064).

Almost surely, 2^20732005 is an apocalyptic number.

It is an amenable number.

20732005 is a deficient number, since it is larger than the sum of its proper divisors (7700507).

20732005 is an equidigital number, since it uses as much as digits as its factorization.

20732005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592355.

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 20732005 is about 4553.2411532885. The cubic root of 20732005 is about 274.7137738181.

Adding to 20732005 its reverse (50023702), we get a palindrome (70755707).

The spelling of 20732005 in words is "twenty million, seven hundred thirty-two thousand, five".