21682652 has 18 divisors (see below), whose sum is σ = 39670008. Its totient is φ = 10368952.

The previous prime is 21682643. The next prime is 21682657. The reversal of 21682652 is 25628612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21682657) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3008 + ... + 7239.

Almost surely, 2^21682652 is an apocalyptic number.

It is an amenable number.

21682652 is a deficient number, since it is larger than the sum of its proper divisors (17987356).

21682652 is a wasteful number, since it uses less digits than its factorization.

21682652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10297 (or 10272 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 21682652 is about 4656.4634649055. The cubic root of 21682652 is about 278.8500969721.

The spelling of 21682652 in words is "twenty-one million, six hundred eighty-two thousand, six hundred fifty-two".