20015242420 has 48 divisors (see below), whose sum is σ = 42388049088. Its totient is φ = 7938417920.

The previous prime is 20015242397. The next prime is 20015242453. The reversal of 20015242420 is 2424251002.

It is a junction number, because it is equal to n+sod(n) for n = 20015242391 and 20015242400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2656779 + ... + 2664301.

It is an arithmetic number, because the mean of its divisors is an integer number (883084356).

Almost surely, 2^20015242420 is an apocalyptic number.

20015242420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20015242420 is an abundant number, since it is smaller than the sum of its proper divisors (22372806668).

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

20015242420 is a wasteful number, since it uses less digits than its factorization.

20015242420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8640 (or 8638 counting only the distinct ones).

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

Adding to 20015242420 its reverse (2424251002), we get a palindrome (22439493422).

The spelling of 20015242420 in words is "twenty billion, fifteen million, two hundred forty-two thousand, four hundred twenty".