20532330 has 192 divisors, whose sum is σ = 69189120. Its totient is φ = 4105728.

The previous prime is 20532313. The next prime is 20532341. The reversal of 20532330 is 3323502.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 188316 + ... + 188424.

It is an arithmetic number, because the mean of its divisors is an integer number (360360).

Almost surely, 2^20532330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20532330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34594560).

20532330 is an abundant number, since it is smaller than the sum of its proper divisors (48656790).

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

20532330 is a wasteful number, since it uses less digits than its factorization.

20532330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 162 counting only the distinct ones).

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

The square root of 20532330 is about 4531.2614137787. The cubic root of 20532330 is about 273.8289820264.

Adding to 20532330 its reverse (3323502), we get a palindrome (23855832).

The spelling of 20532330 in words is "twenty million, five hundred thirty-two thousand, three hundred thirty".