22018825 has 24 divisors (see below), whose sum is σ = 29248128. Its totient is φ = 16385280.

The previous prime is 22018819. The next prime is 22018847. The reversal of 22018825 is 52881022.

It is not a de Polignac number, because 22018825 - 2³ = 22018817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22018793 and 22018802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43524 + ... + 44026.

It is an arithmetic number, because the mean of its divisors is an integer number (1218672).

Almost surely, 2^22018825 is an apocalyptic number.

22018825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22018825 is a deficient number, since it is larger than the sum of its proper divisors (7229303).

22018825 is a wasteful number, since it uses less digits than its factorization.

22018825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 22018825 is about 4692.4220824644. The cubic root of 22018825 is about 280.2838320841.

Adding to 22018825 its reverse (52881022), we get a palindrome (74899847).

It can be divided in two parts, 2201 and 8825, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 22018825 in words is "twenty-two million, eighteen thousand, eight hundred twenty-five".