20433432 has 16 divisors (see below), whose sum is σ = 51083640. Its totient is φ = 6811136.

The previous prime is 20433409. The next prime is 20433437. The reversal of 20433432 is 23433402.

It is a junction number, because it is equal to n+sod(n) for n = 20433399 and 20433408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20433437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425673 + ... + 425720.

Almost surely, 2^20433432 is an apocalyptic number.

It is an amenable number.

20433432 is an abundant number, since it is smaller than the sum of its proper divisors (30650208).

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

20433432 is a wasteful number, since it uses less digits than its factorization.

20433432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851402 (or 851398 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 20433432 is about 4520.3353857872. The cubic root of 20433432 is about 273.3886238867.

Adding to 20433432 its reverse (23433402), we get a palindrome (43866834).

The spelling of 20433432 in words is "twenty million, four hundred thirty-three thousand, four hundred thirty-two".