21823050 has 24 divisors (see below), whose sum is σ = 54121536. Its totient is φ = 5819440.

The previous prime is 21823033. The next prime is 21823063. The reversal of 21823050 is 5032812.

It is a super-2 number, since 2×21823050² = 952491022605000, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72594 + ... + 72893.

It is an arithmetic number, because the mean of its divisors is an integer number (2255064).

Almost surely, 2^21823050 is an apocalyptic number.

21823050 is an abundant number, since it is smaller than the sum of its proper divisors (32298486).

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

21823050 is a wasteful number, since it uses less digits than its factorization.

21823050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145502 (or 145497 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 21823050 is about 4671.5147436351. The cubic root of 21823050 is about 279.4506661604.

Adding to 21823050 its reverse (5032812), we get a palindrome (26855862).

The spelling of 21823050 in words is "twenty-one million, eight hundred twenty-three thousand, fifty".