20552344163 has 16 divisors (see below), whose sum is σ = 23237356800. Its totient is φ = 18035180064.

The previous prime is 20552344091. The next prime is 20552344171. The reversal of 20552344163 is 36144325502.

It is a cyclic number.

It is not a de Polignac number, because 20552344163 - 2²⁸ = 20283908707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20552344963) 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, 162113 + ... + 259586.

It is an arithmetic number, because the mean of its divisors is an integer number (1452334800).

Almost surely, 2^20552344163 is an apocalyptic number.

20552344163 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20552344163 is a deficient number, since it is larger than the sum of its proper divisors (2685012637).

20552344163 is a wasteful number, since it uses less digits than its factorization.

20552344163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421898.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 20552344163 its reverse (36144325502), we get a palindrome (56696669665).

The spelling of 20552344163 in words is "twenty billion, five hundred fifty-two million, three hundred forty-four thousand, one hundred sixty-three".