20542444424340 has 96 divisors (see below), whose sum is σ = 60026491203840. Its totient is φ = 5239215860736.

The previous prime is 20542444424339. The next prime is 20542444424353. The reversal of 20542444424340 is 4342444424502.

It is a junction number, because it is equal to n+sod(n) for n = 20542444424292 and 20542444424301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11352816 + ... + 13037304.

It is an arithmetic number, because the mean of its divisors is an integer number (625275950040).

Almost surely, 2^{20542444424340} is an apocalyptic number.

20542444424340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20542444424340 is an abundant number, since it is smaller than the sum of its proper divisors (39484046779500).

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

20542444424340 is a wasteful number, since it uses less digits than its factorization.

20542444424340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693361 (or 1693359 counting only the distinct ones).

The product of its (nonzero) digits is 1966080, while the sum is 42.

Adding to 20542444424340 its reverse (4342444424502), we get a palindrome (24884888848842).

The spelling of 20542444424340 in words is "twenty trillion, five hundred forty-two billion, four hundred forty-four million, four hundred twenty-four thousand, three hundred forty".