20432500 has 60 divisors (see below), whose sum is σ = 48809376. Its totient is φ = 7420000.

The previous prime is 20432449. The next prime is 20432513. The reversal of 20432500 is 523402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27129 + ... + 27871.

Almost surely, 2^20432500 is an apocalyptic number.

20432500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20432500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24404688).

20432500 is an abundant number, since it is smaller than the sum of its proper divisors (28376876).

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

20432500 is a wasteful number, since it uses less digits than its factorization.

20432500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778 (or 761 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 20432500 is about 4520.2322949158. The cubic root of 20432500 is about 273.3844672661.

Adding to 20432500 its reverse (523402), we get a palindrome (20955902).

The spelling of 20432500 in words is "twenty million, four hundred thirty-two thousand, five hundred".