21549076 has 12 divisors (see below), whose sum is σ = 38274208. Its totient is φ = 10613592.

The previous prime is 21549071. The next prime is 21549079. The reversal of 21549076 is 67094512.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21549071) 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, 39936 + ... + 40471.

Almost surely, 2^21549076 is an apocalyptic number.

It is an amenable number.

21549076 is a deficient number, since it is larger than the sum of its proper divisors (16725132).

21549076 is a wasteful number, since it uses less digits than its factorization.

21549076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80478 (or 80476 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 21549076 is about 4642.0982324807. The cubic root of 21549076 is about 278.2762982882.

The spelling of 21549076 in words is "twenty-one million, five hundred forty-nine thousand, seventy-six".