21362132 has 24 divisors (see below), whose sum is σ = 43182720. Its totient is φ = 9138560.

The previous prime is 21362119. The next prime is 21362161. The reversal of 21362132 is 23126312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13532 + ... + 15027.

It is an arithmetic number, because the mean of its divisors is an integer number (1799280).

Almost surely, 2^21362132 is an apocalyptic number.

21362132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21362132 is an abundant number, since it is smaller than the sum of its proper divisors (21820588).

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

21362132 is a wasteful number, since it uses less digits than its factorization.

21362132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28591 (or 28589 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 21362132 is about 4621.9186492192. The cubic root of 21362132 is about 277.4692528766.

Adding to 21362132 its reverse (23126312), we get a palindrome (44488444).

The spelling of 21362132 in words is "twenty-one million, three hundred sixty-two thousand, one hundred thirty-two".