20145552 has 40 divisors (see below), whose sum is σ = 59478336. Its totient is φ = 5755776.

The previous prime is 20145551. The next prime is 20145557. The reversal of 20145552 is 25554102.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (20145551) by changing a digit.

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, 29643 + ... + 30314.

Almost surely, 2^20145552 is an apocalyptic number.

It is an amenable number.

20145552 is an abundant number, since it is smaller than the sum of its proper divisors (39332784).

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

20145552 is a wasteful number, since it uses less digits than its factorization.

20145552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59975 (or 59969 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 20145552 is about 4488.3796630856. The cubic root of 20145552 is about 272.0986522199.

Adding to 20145552 its reverse (25554102), we get a palindrome (45699654).

It can be divided in two parts, 201 and 45552, that added together give a triangular number (45753 = T₃₀₂).

The spelling of 20145552 in words is "twenty million, one hundred forty-five thousand, five hundred fifty-two".