20112223420 has 12 divisors (see below), whose sum is σ = 42235669224. Its totient is φ = 8044889360.

The previous prime is 20112223403. The next prime is 20112223423. The reversal of 20112223420 is 2432221102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112223423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502805566 + ... + 502805605.

It is an arithmetic number, because the mean of its divisors is an integer number (3519639102).

Almost surely, 2^20112223420 is an apocalyptic number.

20112223420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112223420 is an abundant number, since it is smaller than the sum of its proper divisors (22123445804).

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

20112223420 is a wasteful number, since it uses less digits than its factorization.

20112223420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005611180 (or 1005611178 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20112223420 its reverse (2432221102), we get a palindrome (22544444522).

The spelling of 20112223420 in words is "twenty billion, one hundred twelve million, two hundred twenty-three thousand, four hundred twenty".