20123411220 has 72 divisors (see below), whose sum is σ = 66590203680. Its totient is φ = 4878402240.

The previous prime is 20123411213. The next prime is 20123411281. The reversal of 20123411220 is 2211432102.

It is a happy number.

20123411220 is a `hidden beast` number, since 20 + 12 + 3 + 411 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20123411193 and 20123411202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5079690 + ... + 5083649.

It is an arithmetic number, because the mean of its divisors is an integer number (924863940).

Almost surely, 2^20123411220 is an apocalyptic number.

20123411220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20123411220 is an abundant number, since it is smaller than the sum of its proper divisors (46466792460).

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

20123411220 is a wasteful number, since it uses less digits than its factorization.

20123411220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10163365 (or 10163360 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20123411220 its reverse (2211432102), we get a palindrome (22334843322).

It can be divided in two parts, 2012341 and 1220, that added together give a square (2013561 = 1419²).

The spelling of 20123411220 in words is "twenty billion, one hundred twenty-three million, four hundred eleven thousand, two hundred twenty".