20662000 has 40 divisors (see below), whose sum is σ = 49965552. Its totient is φ = 8264000.

The previous prime is 20661989. The next prime is 20662003. The reversal of 20662000 is 26602.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3166 + ... + 7165.

Almost surely, 2^20662000 is an apocalyptic number.

20662000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20662000 is an abundant number, since it is smaller than the sum of its proper divisors (29303552).

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

20662000 is a wasteful number, since it uses less digits than its factorization.

20662000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10354 (or 10338 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20662000 is about 4545.5472717815. The cubic root of 20662000 is about 274.4042198321.

Adding to 20662000 its reverse (26602), we get a palindrome (20688602).

The spelling of 20662000 in words is "twenty million, six hundred sixty-two thousand".