20224535 has 16 divisors (see below), whose sum is σ = 24929856. Its totient is φ = 15744768.

The previous prime is 20224517. The next prime is 20224537. The reversal of 20224535 is 53542202.

It is a cyclic number.

It is not a de Polignac number, because 20224535 - 2²⁴ = 3447319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20224535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20224537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44027 + ... + 44483.

It is an arithmetic number, because the mean of its divisors is an integer number (1558116).

Almost surely, 2^20224535 is an apocalyptic number.

20224535 is a deficient number, since it is larger than the sum of its proper divisors (4705321).

20224535 is a wasteful number, since it uses less digits than its factorization.

20224535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 20224535 is about 4497.1696654674. The cubic root of 20224535 is about 272.4537867371.

Adding to 20224535 its reverse (53542202), we get a palindrome (73766737).

The spelling of 20224535 in words is "twenty million, two hundred twenty-four thousand, five hundred thirty-five".