20124140220 has 144 divisors (see below), whose sum is σ = 61459612032. Its totient is φ = 5329981440.

The previous prime is 20124140207. The next prime is 20124140251. The reversal of 20124140220 is 2204142102.

20124140220 is a `hidden beast` number, since 2 + 0 + 1 + 241 + 402 + 20 = 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 = 20124140193 and 20124140202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29901804 + ... + 29902476.

Almost surely, 2^20124140220 is an apocalyptic number.

20124140220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20124140220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30729806016).

20124140220 is an abundant number, since it is smaller than the sum of its proper divisors (41335471812).

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

20124140220 is a wasteful number, since it uses less digits than its factorization.

20124140220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572 (or 1567 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20124140220 its reverse (2204142102), we get a palindrome (22328282322).

The spelling of 20124140220 in words is "twenty billion, one hundred twenty-four million, one hundred forty thousand, two hundred twenty".