20660522 has 8 divisors (see below), whose sum is σ = 31453536. Its totient is φ = 10176012.

The previous prime is 20660501. The next prime is 20660527. The reversal of 20660522 is 22506602.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (20660527) 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 in 3 ways as a sum of consecutive naturals, for example, 76958 + ... + 77225.

It is an arithmetic number, because the mean of its divisors is an integer number (3931692).

Almost surely, 2^20660522 is an apocalyptic number.

20660522 is a deficient number, since it is larger than the sum of its proper divisors (10793014).

20660522 is a wasteful number, since it uses less digits than its factorization.

20660522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154252.

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

The square root of 20660522 is about 4545.3846921905. The cubic root of 20660522 is about 274.3976767562.

The spelling of 20660522 in words is "twenty million, six hundred sixty thousand, five hundred twenty-two".