21275076 has 12 divisors (see below), whose sum is σ = 49641872. Its totient is φ = 7091688.

The previous prime is 21275057. The next prime is 21275077. The reversal of 21275076 is 67057212.

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

It is not an unprimeable number, because it can be changed into a prime (21275077) 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, 886450 + ... + 886473.

Almost surely, 2^21275076 is an apocalyptic number.

It is an amenable number.

21275076 is an abundant number, since it is smaller than the sum of its proper divisors (28366796).

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

21275076 is a wasteful number, since it uses less digits than its factorization.

21275076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772930 (or 1772928 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 21275076 is about 4612.4913008048. The cubic root of 21275076 is about 277.0918209673.

The spelling of 21275076 in words is "twenty-one million, two hundred seventy-five thousand, seventy-six".