20662002 has 12 divisors (see below), whose sum is σ = 44767710. Its totient is φ = 6887328.

The previous prime is 20661989. The next prime is 20662003. The reversal of 20662002 is 20026602.

20662002 is a `hidden beast` number, since 2 + 0 + 662 + 0 + 0 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17969121 + 2692881 = 4239^2 + 1641^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1147889 = 20662002 / (2 + 0 + 6 + 6 + 2 + 0 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (20662003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 573927 + ... + 573962.

Almost surely, 2^20662002 is an apocalyptic number.

20662002 is an abundant number, since it is smaller than the sum of its proper divisors (24105708).

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

20662002 is a wasteful number, since it uses less digits than its factorization.

20662002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147897 (or 1147894 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20662002 is about 4545.5474917770. The cubic root of 20662002 is about 274.4042286859.

Adding to 20662002 its reverse (20026602), we get a palindrome (40688604).

The spelling of 20662002 in words is "twenty million, six hundred sixty-two thousand, two".