20224390 has 16 divisors (see below), whose sum is σ = 38545632. Its totient is φ = 7613824.

The previous prime is 20224387. The next prime is 20224423. The reversal of 20224390 is 9342202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59314 + ... + 59653.

It is an arithmetic number, because the mean of its divisors is an integer number (2409102).

Almost surely, 2^20224390 is an apocalyptic number.

20224390 is a deficient number, since it is larger than the sum of its proper divisors (18321242).

20224390 is a wasteful number, since it uses less digits than its factorization.

20224390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118991.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20224390 is about 4497.1535441877. The cubic root of 20224390 is about 272.4531356155.

Adding to 20224390 its reverse (9342202), we get a palindrome (29566592).

The spelling of 20224390 in words is "twenty million, two hundred twenty-four thousand, three hundred ninety".