21242876 has 12 divisors (see below), whose sum is σ = 37593360. Its totient is φ = 10501920.

The previous prime is 21242873. The next prime is 21242917. The reversal of 21242876 is 67824212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21242873) 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, 29480 + ... + 30191.

It is an arithmetic number, because the mean of its divisors is an integer number (3132780).

Almost surely, 2^21242876 is an apocalyptic number.

It is an amenable number.

21242876 is a deficient number, since it is larger than the sum of its proper divisors (16350484).

21242876 is a wasteful number, since it uses less digits than its factorization.

21242876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59764 (or 59762 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 21242876 is about 4608.9994575830. Note that the first 3 decimals coincide. The cubic root of 21242876 is about 276.9519568092.

The spelling of 21242876 in words is "twenty-one million, two hundred forty-two thousand, eight hundred seventy-six".