21276192 has 72 divisors (see below), whose sum is σ = 64982736. Its totient is φ = 6077568.

The previous prime is 21276191. The next prime is 21276193. The reversal of 21276192 is 29167212.

It is an interprime number because it is at equal distance from previous prime (21276191) and next prime (21276193).

It is not an unprimeable number, because it can be changed into a prime (21276191) 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, 2443 + ... + 6965.

It is an arithmetic number, because the mean of its divisors is an integer number (902538).

Almost surely, 2^21276192 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 21276192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32491368).

21276192 is an abundant number, since it is smaller than the sum of its proper divisors (43706544).

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

21276192 is a wasteful number, since it uses less digits than its factorization.

21276192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4550 (or 4535 counting only the distinct ones).

The product of its digits is 3024, while the sum is 30.

The square root of 21276192 is about 4612.6122750563. The cubic root of 21276192 is about 277.0966659020.

The spelling of 21276192 in words is "twenty-one million, two hundred seventy-six thousand, one hundred ninety-two".