21282650 has 12 divisors (see below), whose sum is σ = 39585822. Its totient is φ = 8513040.

The previous prime is 21282643. The next prime is 21282661. The reversal of 21282650 is 5628212.

It can be written as a sum of positive squares in 3 ways, for example, as 18258529 + 3024121 = 4273^2 + 1739^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 212777 + ... + 212876.

Almost surely, 2^21282650 is an apocalyptic number.

21282650 is a deficient number, since it is larger than the sum of its proper divisors (18303172).

21282650 is a wasteful number, since it uses less digits than its factorization.

21282650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425665 (or 425660 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 21282650 is about 4613.3122591041. The cubic root of 21282650 is about 277.1246989454.

The spelling of 21282650 in words is "twenty-one million, two hundred eighty-two thousand, six hundred fifty".