20622666 has 16 divisors (see below), whose sum is σ = 43671744. Its totient is φ = 6469824.

The previous prime is 20622661. The next prime is 20622673. The reversal of 20622666 is 66622602.

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, 100990 + ... + 101193.

It is an arithmetic number, because the mean of its divisors is an integer number (2729484).

Almost surely, 2^20622666 is an apocalyptic number.

20622666 is an abundant number, since it is smaller than the sum of its proper divisors (23049078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20622666 is a wasteful number, since it uses less digits than its factorization.

20622666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202205.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 20622666 is about 4541.2185589333. The cubic root of 20622666 is about 274.2299825538.

The spelling of 20622666 in words is "twenty million, six hundred twenty-two thousand, six hundred sixty-six".