20662528 has 18 divisors (see below), whose sum is σ = 41244854. Its totient is φ = 10331136.

The previous prime is 20662517. The next prime is 20662547. The reversal of 20662528 is 82526602.

It can be written as a sum of positive squares in only one way, i.e., 11614464 + 9048064 = 3408^2 + 3008^2 .

It is a zygodrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 20662528.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40101 + ... + 40612.

Almost surely, 2^20662528 is an apocalyptic number.

It is an amenable number.

20662528 is a deficient number, since it is larger than the sum of its proper divisors (20582326).

20662528 is an frugal number, since it uses more digits than its factorization.

20662528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80729 (or 80715 counting only the distinct ones).

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

The square root of 20662528 is about 4545.6053502256. The cubic root of 20662528 is about 274.4065572018.

The spelling of 20662528 in words is "twenty million, six hundred sixty-two thousand, five hundred twenty-eight".