20553430 has 16 divisors (see below), whose sum is σ = 37465920. Its totient is φ = 8116992.

The previous prime is 20553361. The next prime is 20553433. The reversal of 20553430 is 3435502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12219 + ... + 13798.

It is an arithmetic number, because the mean of its divisors is an integer number (2341620).

Almost surely, 2^20553430 is an apocalyptic number.

20553430 is a deficient number, since it is larger than the sum of its proper divisors (16912490).

20553430 is a wasteful number, since it uses less digits than its factorization.

20553430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26103.

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 20553430 is about 4533.5890859230. The cubic root of 20553430 is about 273.9227498140.

Adding to 20553430 its reverse (3435502), we get a palindrome (23988932).

It can be divided in two parts, 205 and 53430, that added together give a palindrome (53635).

The spelling of 20553430 in words is "twenty million, five hundred fifty-three thousand, four hundred thirty".