20530332 has 36 divisors (see below), whose sum is σ = 52066560. Its totient is φ = 6820992.

The previous prime is 20530331. The next prime is 20530333. The reversal of 20530332 is 23303502.

It is an interprime number because it is at equal distance from previous prime (20530331) and next prime (20530333).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13044 + ... + 14532.

Almost surely, 2^20530332 is an apocalyptic number.

It is an amenable number.

20530332 is an abundant number, since it is smaller than the sum of its proper divisors (31536228).

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

20530332 is a wasteful number, since it uses less digits than its factorization.

20530332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1882 (or 1877 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 18.

The square root of 20530332 is about 4531.0409400048. The cubic root of 20530332 is about 273.8200996435.

Adding to 20530332 its reverse (23303502), we get a palindrome (43833834).

The spelling of 20530332 in words is "twenty million, five hundred thirty thousand, three hundred thirty-two".