21496771 has 8 divisors (see below), whose sum is σ = 22673600. Its totient is φ = 20324520.

The previous prime is 21496763. The next prime is 21496817. The reversal of 21496771 is 17769412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21496771 - 2³ = 21496763 is a prime.

It is a super-2 number, since 2×21496771² = 924222326852882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21496771.

It is not an unprimeable number, because it can be changed into a prime (21496571) 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, 13276 + ... + 14806.

It is an arithmetic number, because the mean of its divisors is an integer number (2834200).

Almost surely, 2^21496771 is an apocalyptic number.

21496771 is a deficient number, since it is larger than the sum of its proper divisors (1176829).

21496771 is a wasteful number, since it uses less digits than its factorization.

21496771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289.

The product of its digits is 21168, while the sum is 37.

The square root of 21496771 is about 4636.4610426488. The cubic root of 21496771 is about 278.0509671404.

The spelling of 21496771 in words is "twenty-one million, four hundred ninety-six thousand, seven hundred seventy-one".