20125240420 has 48 divisors (see below), whose sum is σ = 44837775360. Its totient is φ = 7566338304.

The previous prime is 20125240391. The next prime is 20125240451. The reversal of 20125240420 is 2404252102.

It is a junction number, because it is equal to n+sod(n) for n = 20125240391 and 20125240400.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160249 + ... + 256768.

It is an arithmetic number, because the mean of its divisors is an integer number (934120320).

Almost surely, 2^20125240420 is an apocalyptic number.

20125240420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20125240420 is an abundant number, since it is smaller than the sum of its proper divisors (24712534940).

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

20125240420 is a wasteful number, since it uses less digits than its factorization.

20125240420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417172 (or 417170 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 20125240420 its reverse (2404252102), we get a palindrome (22529492522).

The spelling of 20125240420 in words is "twenty billion, one hundred twenty-five million, two hundred forty thousand, four hundred twenty".