20232220 has 24 divisors (see below), whose sum is σ = 43291584. Its totient is φ = 7939776.

The previous prime is 20232211. The next prime is 20232239. The reversal of 20232220 is 2223202.

It is a super-2 number, since 2×20232220² = 818685452256800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20232220.

It is a congruent number.

It is an unprimeable number.

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, 8484 + ... + 10603.

It is an arithmetic number, because the mean of its divisors is an integer number (1803816).

Almost surely, 2^20232220 is an apocalyptic number.

20232220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20232220 is an abundant number, since it is smaller than the sum of its proper divisors (23059364).

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

20232220 is a wasteful number, since it uses less digits than its factorization.

20232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19149 (or 19147 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 20232220 is about 4498.0240106073. The cubic root of 20232220 is about 272.4882917282.

Adding to 20232220 its reverse (2223202), we get a palindrome (22455422).

The spelling of 20232220 in words is "twenty million, two hundred thirty-two thousand, two hundred twenty".