20332665 has 12 divisors (see below), whose sum is σ = 35243364. Its totient is φ = 10844064.

The previous prime is 20332661. The next prime is 20332693. The reversal of 20332665 is 56623302.

It can be written as a sum of positive squares in 2 ways, for example, as 13860729 + 6471936 = 3723^2 + 2544^2 .

It is not a de Polignac number, because 20332665 - 2² = 20332661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20332661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 225874 + ... + 225963.

It is an arithmetic number, because the mean of its divisors is an integer number (2936947).

Almost surely, 2^20332665 is an apocalyptic number.

It is an amenable number.

20332665 is a deficient number, since it is larger than the sum of its proper divisors (14910699).

20332665 is a wasteful number, since it uses less digits than its factorization.

20332665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451848 (or 451845 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 20332665 is about 4509.1756452815. The cubic root of 20332665 is about 272.9384798783.

Adding to 20332665 its reverse (56623302), we get a palindrome (76955967).

The spelling of 20332665 in words is "twenty million, three hundred thirty-two thousand, six hundred sixty-five".