20330465 has 8 divisors (see below), whose sum is σ = 24991848. Its totient is φ = 15867520.

The previous prime is 20330411. The next prime is 20330467. The reversal of 20330465 is 56403302.

It can be written as a sum of positive squares in 4 ways, for example, as 678976 + 19651489 = 824^2 + 4433^2 .

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

It is not a de Polignac number, because 20330465 - 2¹⁴ = 20314081 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20330465.

It is not an unprimeable number, because it can be changed into a prime (20330467) 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, 49382 + ... + 49791.

It is an arithmetic number, because the mean of its divisors is an integer number (3123981).

Almost surely, 2^20330465 is an apocalyptic number.

It is an amenable number.

20330465 is a deficient number, since it is larger than the sum of its proper divisors (4661383).

20330465 is an equidigital number, since it uses as much as digits as its factorization.

20330465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99219.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 20330465 is about 4508.9316916538. The cubic root of 20330465 is about 272.9286355168.

Adding to 20330465 its reverse (56403302), we get a palindrome (76733767).

The spelling of 20330465 in words is "twenty million, three hundred thirty thousand, four hundred sixty-five".