21650682 has 32 divisors (see below), whose sum is σ = 45527040. Its totient is φ = 6850800.

The previous prime is 21650653. The next prime is 21650683. The reversal of 21650682 is 28605612.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (21650683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20319 + ... + 21357.

It is an arithmetic number, because the mean of its divisors is an integer number (1422720).

Almost surely, 2^21650682 is an apocalyptic number.

21650682 is an abundant number, since it is smaller than the sum of its proper divisors (23876358).

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

21650682 is a wasteful number, since it uses less digits than its factorization.

21650682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 21650682 is about 4653.0293358198. The cubic root of 21650682 is about 278.7129793248.

The spelling of 21650682 in words is "twenty-one million, six hundred fifty thousand, six hundred eighty-two".