20735232 has 216 divisors, whose sum is σ = 69904800. Its totient is φ = 5419008.

The previous prime is 20735201. The next prime is 20735293. The reversal of 20735232 is 23253702.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 714994 + ... + 715022.

Almost surely, 2^20735232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20735232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34952400).

20735232 is an abundant number, since it is smaller than the sum of its proper divisors (49169568).

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

20735232 is a wasteful number, since it uses less digits than its factorization.

20735232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 24.

The square root of 20735232 is about 4553.5955024574. The cubic root of 20735232 is about 274.7280264250.

Adding to 20735232 its reverse (23253702), we get a palindrome (43988934).

The spelling of 20735232 in words is "twenty million, seven hundred thirty-five thousand, two hundred thirty-two".