21823045 has 8 divisors (see below), whose sum is σ = 26394624. Its totient is φ = 17320464.

The previous prime is 21823033. The next prime is 21823063. The reversal of 21823045 is 54032812.

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 21823045 - 2¹⁷ = 21691973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16549 + ... + 17818.

It is an arithmetic number, because the mean of its divisors is an integer number (3299328).

Almost surely, 2^21823045 is an apocalyptic number.

It is an amenable number.

21823045 is a deficient number, since it is larger than the sum of its proper divisors (4571579).

21823045 is a wasteful number, since it uses less digits than its factorization.

21823045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34499.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 21823045 is about 4671.5142084767. The cubic root of 21823045 is about 279.4506448183.

Adding to 21823045 its reverse (54032812), we get a palindrome (75855857).

The spelling of 21823045 in words is "twenty-one million, eight hundred twenty-three thousand, forty-five".