20123424131340 has 48 divisors (see below), whose sum is σ = 59311144811520. Its totient is φ = 5083812411840.

The previous prime is 20123424131323. The next prime is 20123424131341. The reversal of 20123424131340 is 4313142432102.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20123424131298 and 20123424131307.

It is not an unprimeable number, because it can be changed into a prime (20123424131341) 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 15 ways as a sum of consecutive naturals, for example, 8826062076 + ... + 8826064355.

It is an arithmetic number, because the mean of its divisors is an integer number (1235648850240).

Almost surely, 2^{20123424131340} is an apocalyptic number.

20123424131340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20123424131340 is an abundant number, since it is smaller than the sum of its proper divisors (39187720680180).

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

20123424131340 is a wasteful number, since it uses less digits than its factorization.

20123424131340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17652126462 (or 17652126460 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 20123424131340 its reverse (4313142432102), we get a palindrome (24436566563442).

The spelling of 20123424131340 in words is "twenty trillion, one hundred twenty-three billion, four hundred twenty-four million, one hundred thirty-one thousand, three hundred forty".