20223288 has 24 divisors (see below), whose sum is σ = 54771600. Its totient is φ = 6741072.

The previous prime is 20223283. The next prime is 20223341. The reversal of 20223288 is 88232202.

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

It is a super-3 number, since 3×20223288³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20223283) 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 5 ways as a sum of consecutive naturals, for example, 140368 + ... + 140511.

It is an arithmetic number, because the mean of its divisors is an integer number (2282150).

Almost surely, 2^20223288 is an apocalyptic number.

It is an amenable number.

20223288 is an abundant number, since it is smaller than the sum of its proper divisors (34548312).

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

20223288 is a wasteful number, since it uses less digits than its factorization.

20223288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280891 (or 280884 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 20223288 is about 4497.0310205735. The cubic root of 20223288 is about 272.4481869898.

The spelling of 20223288 in words is "twenty million, two hundred twenty-three thousand, two hundred eighty-eight".