20606522 has 4 divisors (see below), whose sum is σ = 30909786. Its totient is φ = 10303260.

The previous prime is 20606491. The next prime is 20606527. The reversal of 20606522 is 22560602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15673681 + 4932841 = 3959^2 + 2221^2 .

It is not an unprimeable number, because it can be changed into a prime (20606527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5151629 + ... + 5151632.

Almost surely, 2^20606522 is an apocalyptic number.

20606522 is a deficient number, since it is larger than the sum of its proper divisors (10303264).

20606522 is a wasteful number, since it uses less digits than its factorization.

20606522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10303263.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20606522 is about 4539.4407144493. The cubic root of 20606522 is about 274.1584055718.

The spelling of 20606522 in words is "twenty million, six hundred six thousand, five hundred twenty-two".