21986076 has 24 divisors (see below), whose sum is σ = 58629760. Its totient is φ = 6281712.

The previous prime is 21986057. The next prime is 21986077. The reversal of 21986076 is 67068912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21986077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130786 + ... + 130953.

Almost surely, 2^21986076 is an apocalyptic number.

It is an amenable number.

21986076 is an abundant number, since it is smaller than the sum of its proper divisors (36643684).

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

21986076 is a wasteful number, since it uses less digits than its factorization.

21986076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261753 (or 261751 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 21986076 is about 4688.9312215045. The cubic root of 21986076 is about 280.1448060509.

The spelling of 21986076 in words is "twenty-one million, nine hundred eighty-six thousand, seventy-six".