21276348 has 12 divisors (see below), whose sum is σ = 49644840. Its totient is φ = 7092112.

The previous prime is 21276347. The next prime is 21276377. The reversal of 21276348 is 84367212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21276347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 886503 + ... + 886526.

It is an arithmetic number, because the mean of its divisors is an integer number (4137070).

Almost surely, 2^21276348 is an apocalyptic number.

It is an amenable number.

21276348 is an abundant number, since it is smaller than the sum of its proper divisors (28368492).

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

21276348 is a wasteful number, since it uses less digits than its factorization.

21276348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773036 (or 1773034 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 21276348 is about 4612.6291851828. The cubic root of 21276348 is about 277.0973431375.

The spelling of 21276348 in words is "twenty-one million, two hundred seventy-six thousand, three hundred forty-eight".