20420242040044 has 48 divisors (see below), whose sum is σ = 44583339580416. Its totient is φ = 7950566275200.

The previous prime is 20420242040039. The next prime is 20420242040071. The reversal of 20420242040044 is 44004024202402.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 20420242039994 and 20420242040021.

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, 21927204 + ... + 22839499.

It is an arithmetic number, because the mean of its divisors is an integer number (928819574592).

Almost surely, 2^{20420242040044} is an apocalyptic number.

It is an amenable number.

20420242040044 is an abundant number, since it is smaller than the sum of its proper divisors (24163097540372).

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

20420242040044 is a wasteful number, since it uses less digits than its factorization.

20420242040044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44768206 (or 44768204 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 20420242040044 its reverse (44004024202402), we get a palindrome (64424266242446).

The spelling of 20420242040044 in words is "twenty trillion, four hundred twenty billion, two hundred forty-two million, forty thousand, forty-four".