20124113420 has 24 divisors (see below), whose sum is σ = 42475167504. Its totient is φ = 8008782656.

The previous prime is 20124113411. The next prime is 20124113423. The reversal of 20124113420 is 2431142102.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20124113392 and 20124113401.

It is not an unprimeable number, because it can be changed into a prime (20124113423) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2549882 + ... + 2557761.

It is an arithmetic number, because the mean of its divisors is an integer number (1769798646).

Almost surely, 2^20124113420 is an apocalyptic number.

20124113420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20124113420 is an abundant number, since it is smaller than the sum of its proper divisors (22351054084).

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

20124113420 is a wasteful number, since it uses less digits than its factorization.

20124113420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5107849 (or 5107847 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20124113420 its reverse (2431142102), we get a palindrome (22555255522).

The spelling of 20124113420 in words is "twenty billion, one hundred twenty-four million, one hundred thirteen thousand, four hundred twenty".