20442103420 has 48 divisors (see below), whose sum is σ = 45239725440. Its totient is φ = 7737581376.

The previous prime is 20442103391. The next prime is 20442103453. The reversal of 20442103420 is 2430124402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20442103391 and 20442103400.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 305079 + ... + 366001.

It is an arithmetic number, because the mean of its divisors is an integer number (942494280).

Almost surely, 2^20442103420 is an apocalyptic number.

20442103420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20442103420 is an abundant number, since it is smaller than the sum of its proper divisors (24797622020).

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

20442103420 is a wasteful number, since it uses less digits than its factorization.

20442103420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61834 (or 61832 counting only the distinct ones).

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

Adding to 20442103420 its reverse (2430124402), we get a palindrome (22872227822).

The spelling of 20442103420 in words is "twenty billion, four hundred forty-two million, one hundred three thousand, four hundred twenty".