20562628 has 6 divisors (see below), whose sum is σ = 35984606. Its totient is φ = 10281312.

The previous prime is 20562623. The next prime is 20562631. The reversal of 20562628 is 82626502.

It can be written as a sum of positive squares in only one way, i.e., 19784704 + 777924 = 4448^2 + 882^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20562628.

It is not an unprimeable number, because it can be changed into a prime (20562623) 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 as a sum of consecutive naturals, namely, 2570325 + ... + 2570332.

Almost surely, 2^20562628 is an apocalyptic number.

It is an amenable number.

20562628 is a deficient number, since it is larger than the sum of its proper divisors (15421978).

20562628 is a wasteful number, since it uses less digits than its factorization.

20562628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5140661 (or 5140659 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 20562628 is about 4534.6034005192. The cubic root of 20562628 is about 273.9636053743.

The spelling of 20562628 in words is "twenty million, five hundred sixty-two thousand, six hundred twenty-eight".