21799082 has 8 divisors (see below), whose sum is σ = 33234852. Its totient is φ = 10720800.

The previous prime is 21799079. The next prime is 21799091. The reversal of 21799082 is 28099712.

It can be written as a sum of positive squares in 2 ways, for example, as 21631801 + 167281 = 4651^2 + 409^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89219 + ... + 89462.

Almost surely, 2^21799082 is an apocalyptic number.

21799082 is a deficient number, since it is larger than the sum of its proper divisors (11435770).

21799082 is a wasteful number, since it uses less digits than its factorization.

21799082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178744.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 21799082 is about 4668.9487039375. The cubic root of 21799082 is about 279.3483228868.

It can be divided in two parts, 217 and 99082, that added together give a palindrome (99299).

The spelling of 21799082 in words is "twenty-one million, seven hundred ninety-nine thousand, eighty-two".