21376936 has 48 divisors (see below), whose sum is σ = 48673440. Its totient is φ = 8759520.

The previous prime is 21376933. The next prime is 21376937. The reversal of 21376936 is 63967312.

It is a junction number, because it is equal to n+sod(n) for n = 21376895 and 21376904.

It is not an unprimeable number, because it can be changed into a prime (21376931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7831 + ... + 10201.

It is an arithmetic number, because the mean of its divisors is an integer number (1014030).

Almost surely, 2^21376936 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 21376936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24336720).

21376936 is an abundant number, since it is smaller than the sum of its proper divisors (27296504).

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

21376936 is a wasteful number, since it uses less digits than its factorization.

21376936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414 (or 2403 counting only the distinct ones).

The product of its digits is 40824, while the sum is 37.

The square root of 21376936 is about 4623.5198712669. The cubic root of 21376936 is about 277.5333336577.

The spelling of 21376936 in words is "twenty-one million, three hundred seventy-six thousand, nine hundred thirty-six".