20423632 has 60 divisors (see below), whose sum is σ = 43886080. Its totient is φ = 9180864.

The previous prime is 20423621. The next prime is 20423639. The reversal of 20423632 is 23632402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160753 + ... + 160879.

Almost surely, 2^20423632 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 20423632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21943040).

20423632 is an abundant number, since it is smaller than the sum of its proper divisors (23462448).

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

20423632 is a wasteful number, since it uses less digits than its factorization.

20423632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 20423632 is about 4519.2512654200. The cubic root of 20423632 is about 273.3449106075.

The spelling of 20423632 in words is "twenty million, four hundred twenty-three thousand, six hundred thirty-two".