20662264 has 32 divisors (see below), whose sum is σ = 44945280. Its totient is φ = 8721504.

The previous prime is 20662247. The next prime is 20662273. The reversal of 20662264 is 46226602.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 999 + ... + 6505.

It is an arithmetic number, because the mean of its divisors is an integer number (1404540).

Almost surely, 2^20662264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20662264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22472640).

20662264 is an abundant number, since it is smaller than the sum of its proper divisors (24283016).

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

20662264 is a wasteful number, since it uses less digits than its factorization.

20662264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5587 (or 5583 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 20662264 is about 4545.5763110963. The cubic root of 20662264 is about 274.4053885219.

Adding to 20662264 its reverse (46226602), we get a palindrome (66888866).

The spelling of 20662264 in words is "twenty million, six hundred sixty-two thousand, two hundred sixty-four".