21022132 has 48 divisors (see below), whose sum is σ = 41912640. Its totient is φ = 9165312.

The previous prime is 21022117. The next prime is 21022163. The reversal of 21022132 is 23122012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68323 + ... + 68629.

It is an arithmetic number, because the mean of its divisors is an integer number (873180).

Almost surely, 2^21022132 is an apocalyptic number.

It is an amenable number.

21022132 is a deficient number, since it is larger than the sum of its proper divisors (20890508).

21022132 is a wasteful number, since it uses less digits than its factorization.

21022132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 21022132 is about 4584.9898582222. The cubic root of 21022132 is about 275.9893050536.

Adding to 21022132 its reverse (23122012), we get a palindrome (44144144).

The spelling of 21022132 in words is "twenty-one million, twenty-two thousand, one hundred thirty-two".