20331132 has 24 divisors (see below), whose sum is σ = 47561472. Its totient is φ = 6759600.

The previous prime is 20331127. The next prime is 20331139. The reversal of 20331132 is 23113302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331139) 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, 3207 + ... + 7137.

It is an arithmetic number, because the mean of its divisors is an integer number (1981728).

Almost surely, 2^20331132 is an apocalyptic number.

It is an amenable number.

20331132 is an abundant number, since it is smaller than the sum of its proper divisors (27230340).

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

20331132 is a wasteful number, since it uses less digits than its factorization.

20331132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4369 (or 4367 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 20331132 is about 4509.0056553524. The cubic root of 20331132 is about 272.9316202232.

Adding to 20331132 its reverse (23113302), we get a palindrome (43444434).

The spelling of 20331132 in words is "twenty million, three hundred thirty-one thousand, one hundred thirty-two".