21682896 has 40 divisors (see below), whose sum is σ = 56183904. Its totient is φ = 7205760.

The previous prime is 21682861. The next prime is 21682897. The reversal of 21682896 is 69828612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21682897) 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, 26331 + ... + 27141.

Almost surely, 2^21682896 is an apocalyptic number.

It is an amenable number.

21682896 is an abundant number, since it is smaller than the sum of its proper divisors (34501008).

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

21682896 is a wasteful number, since it uses less digits than its factorization.

21682896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379 (or 1373 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 21682896 is about 4656.4896649730. The cubic root of 21682896 is about 278.8511429568.

It can be divided in two parts, 21682 and 896, that added together give a triangular number (22578 = T₂₁₂).

The spelling of 21682896 in words is "twenty-one million, six hundred eighty-two thousand, eight hundred ninety-six".