21822469 has 8 divisors (see below), whose sum is σ = 23970240. Its totient is φ = 19774656.

The previous prime is 21822461. The next prime is 21822473. The reversal of 21822469 is 96422812.

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 21822469 - 2³ = 21822461 is a prime.

It is a super-2 number, since 2×21822469² = 952440306511922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21822461) 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, 24532 + ... + 25405.

It is an arithmetic number, because the mean of its divisors is an integer number (2996280).

Almost surely, 2^21822469 is an apocalyptic number.

It is an amenable number.

21822469 is a deficient number, since it is larger than the sum of its proper divisors (2147771).

21822469 is a wasteful number, since it uses less digits than its factorization.

21822469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49979.

The product of its digits is 13824, while the sum is 34.

The square root of 21822469 is about 4671.4525578240. The cubic root of 21822469 is about 279.4481861790.

The spelling of 21822469 in words is "twenty-one million, eight hundred twenty-two thousand, four hundred sixty-nine".