20666330132 has 24 divisors (see below), whose sum is σ = 41595934464. Its totient is φ = 8800582752.

The previous prime is 20666330129. The next prime is 20666330137. The reversal of 20666330132 is 23103366602.

It is a super-2 number, since 2×20666330132² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20666330137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2346188 + ... + 2354979.

It is an arithmetic number, because the mean of its divisors is an integer number (1733163936).

Almost surely, 2^20666330132 is an apocalyptic number.

It is an amenable number.

20666330132 is an abundant number, since it is smaller than the sum of its proper divisors (20929604332).

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

20666330132 is a wasteful number, since it uses less digits than its factorization.

20666330132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4701335 (or 4701333 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 32.

Adding to 20666330132 its reverse (23103366602), we get a palindrome (43769696734).

The spelling of 20666330132 in words is "twenty billion, six hundred sixty-six million, three hundred thirty thousand, one hundred thirty-two".