20231242420 has 24 divisors (see below), whose sum is σ = 42720343848. Its totient is φ = 8047785600.

The previous prime is 20231242399. The next prime is 20231242439. The reversal of 20231242420 is 2424213202.

It can be written as a sum of positive squares in 4 ways, for example, as 2517229584 + 17714012836 = 50172^2 + 133094^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20231242391 and 20231242400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2790751 + ... + 2797990.

It is an arithmetic number, because the mean of its divisors is an integer number (1780014327).

Almost surely, 2^20231242420 is an apocalyptic number.

20231242420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20231242420 is an abundant number, since it is smaller than the sum of its proper divisors (22489101428).

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

20231242420 is a wasteful number, since it uses less digits than its factorization.

20231242420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5588931 (or 5588929 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20231242420 its reverse (2424213202), we get a palindrome (22655455622).

The spelling of 20231242420 in words is "twenty billion, two hundred thirty-one million, two hundred forty-two thousand, four hundred twenty".