21676264 has 16 divisors (see below), whose sum is σ = 42782400. Its totient is φ = 10267632.

The previous prime is 21676261. The next prime is 21676273. The reversal of 21676264 is 46267612.

It is not an unprimeable number, because it can be changed into a prime (21676261) 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, 71152 + ... + 71455.

It is an arithmetic number, because the mean of its divisors is an integer number (2673900).

Almost surely, 2^21676264 is an apocalyptic number.

It is an amenable number.

21676264 is a deficient number, since it is larger than the sum of its proper divisors (21106136).

21676264 is a wasteful number, since it uses less digits than its factorization.

21676264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142632 (or 142628 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 21676264 is about 4655.7774860919. Note that the first 3 decimals coincide. The cubic root of 21676264 is about 278.8227099566.

The spelling of 21676264 in words is "twenty-one million, six hundred seventy-six thousand, two hundred sixty-four".