21348936 has 48 divisors (see below), whose sum is σ = 66081600. Its totient is φ = 6099552.

The previous prime is 21348911. The next prime is 21348953. The reversal of 21348936 is 63984312.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21348936.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20676 + ... + 21683.

It is an arithmetic number, because the mean of its divisors is an integer number (1376700).

Almost surely, 2^21348936 is an apocalyptic number.

It is an amenable number.

21348936 is an abundant number, since it is smaller than the sum of its proper divisors (44732664).

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

21348936 is a wasteful number, since it uses less digits than its factorization.

21348936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42378 (or 42371 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 21348936 is about 4620.4908830123. The cubic root of 21348936 is about 277.4121075434.

The spelling of 21348936 in words is "twenty-one million, three hundred forty-eight thousand, nine hundred thirty-six".