20385432 has 80 divisors (see below), whose sum is σ = 57746040. Its totient is φ = 6718464.

The previous prime is 20385419. The next prime is 20385437. The reversal of 20385432 is 23458302.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20385396 and 20385405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20385437) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 105528 + ... + 105720.

Almost surely, 2^20385432 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 20385432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28873020).

20385432 is an abundant number, since it is smaller than the sum of its proper divisors (37360608).

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

20385432 is a wasteful number, since it uses less digits than its factorization.

20385432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 20385432 is about 4515.0229235298. The cubic root of 20385432 is about 273.1743844185.

The spelling of 20385432 in words is "twenty million, three hundred eighty-five thousand, four hundred thirty-two".