21838832 has 40 divisors (see below), whose sum is σ = 43765056. Its totient is φ = 10551296.

The previous prime is 21838823. The next prime is 21838837. The reversal of 21838832 is 23883812.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21838792 and 21838801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21838837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84848 + ... + 85104.

Almost surely, 2^21838832 is an apocalyptic number.

It is an amenable number.

21838832 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

21838832 is a wasteful number, since it uses less digits than its factorization.

21838832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 419 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 21838832 is about 4673.2036120845. The cubic root of 21838832 is about 279.5180143343.

The spelling of 21838832 in words is "twenty-one million, eight hundred thirty-eight thousand, eight hundred thirty-two".