21650796 has 18 divisors (see below), whose sum is σ = 54728492. Its totient is φ = 7216920.

The previous prime is 21650789. The next prime is 21650813. The reversal of 21650796 is 69705612.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 601411 = 21650796 / (2 + 1 + 6 + 5 + 0 + 7 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 21650796.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 300670 + ... + 300741.

Almost surely, 2^21650796 is an apocalyptic number.

It is an amenable number.

21650796 is an abundant number, since it is smaller than the sum of its proper divisors (33077696).

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

21650796 is a wasteful number, since it uses less digits than its factorization.

21650796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601421 (or 601416 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 21650796 is about 4653.0415858877. The cubic root of 21650796 is about 278.7134685045.

The spelling of 21650796 in words is "twenty-one million, six hundred fifty thousand, seven hundred ninety-six".