20530432 has 72 divisors (see below), whose sum is σ = 45785600. Its totient is φ = 9123840.

The previous prime is 20530427. The next prime is 20530453. The reversal of 20530432 is 23403502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103069 + ... + 103267.

Almost surely, 2^20530432 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 20530432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22892800).

20530432 is an abundant number, since it is smaller than the sum of its proper divisors (25255168).

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

20530432 is a wasteful number, since it uses less digits than its factorization.

20530432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 20530432 is about 4531.0519749833. The cubic root of 20530432 is about 273.8205442209.

Adding to 20530432 its reverse (23403502), we get a palindrome (43933934).

The spelling of 20530432 in words is "twenty million, five hundred thirty thousand, four hundred thirty-two".