20163552 has 24 divisors (see below), whose sum is σ = 52929576. Its totient is φ = 6721152.

The previous prime is 20163551. The next prime is 20163593. The reversal of 20163552 is 25536102.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20163551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104923 + ... + 105114.

It is an arithmetic number, because the mean of its divisors is an integer number (2205399).

Almost surely, 2^20163552 is an apocalyptic number.

It is an amenable number.

20163552 is an abundant number, since it is smaller than the sum of its proper divisors (32766024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20163552 is a wasteful number, since it uses less digits than its factorization.

20163552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210050 (or 210042 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 20163552 is about 4490.3843933454. The cubic root of 20163552 is about 272.1796679159.

Adding to 20163552 its reverse (25536102), we get a palindrome (45699654).

The spelling of 20163552 in words is "twenty million, one hundred sixty-three thousand, five hundred fifty-two".