20332144 has 20 divisors (see below), whose sum is σ = 45021424. Its totient is φ = 8713728.

The previous prime is 20332133. The next prime is 20332159. The reversal of 20332144 is 44123302.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 90657 + ... + 90880.

Almost surely, 2^20332144 is an apocalyptic number.

It is an amenable number.

20332144 is an abundant number, since it is smaller than the sum of its proper divisors (24689280).

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

20332144 is a wasteful number, since it uses less digits than its factorization.

20332144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181552 (or 181546 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20332144 is about 4509.1178738197. The cubic root of 20332144 is about 272.9361486187.

Adding to 20332144 its reverse (44123302), we get a palindrome (64455446).

The spelling of 20332144 in words is "twenty million, three hundred thirty-two thousand, one hundred forty-four".