20622665 has 8 divisors (see below), whose sum is σ = 28282560. Its totient is φ = 14141232.

The previous prime is 20622661. The next prime is 20622673. The reversal of 20622665 is 56622602.

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

It is not a de Polignac number, because 20622665 - 2² = 20622661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20622661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294575 + ... + 294644.

It is an arithmetic number, because the mean of its divisors is an integer number (3535320).

Almost surely, 2^20622665 is an apocalyptic number.

It is an amenable number.

20622665 is a deficient number, since it is larger than the sum of its proper divisors (7659895).

20622665 is an equidigital number, since it uses as much as digits as its factorization.

20622665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589231.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 20622665 is about 4541.2184488307. The cubic root of 20622665 is about 274.2299781213.

The spelling of 20622665 in words is "twenty million, six hundred twenty-two thousand, six hundred sixty-five".