20145588 has 24 divisors (see below), whose sum is σ = 47218080. Its totient is φ = 6684960.

The previous prime is 20145583. The next prime is 20145589. The reversal of 20145588 is 88554102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20145581) 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 7 ways as a sum of consecutive naturals, for example, 918 + ... + 6413.

It is an arithmetic number, because the mean of its divisors is an integer number (1967420).

Almost surely, 2^20145588 is an apocalyptic number.

It is an amenable number.

20145588 is an abundant number, since it is smaller than the sum of its proper divisors (27072492).

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

20145588 is a wasteful number, since it uses less digits than its factorization.

20145588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7567 (or 7565 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 33.

The square root of 20145588 is about 4488.3836734397. The cubic root of 20145588 is about 272.0988142995.

The spelling of 20145588 in words is "twenty million, one hundred forty-five thousand, five hundred eighty-eight".