20402042444020 has 48 divisors (see below), whose sum is σ = 46554066316800. Its totient is φ = 7481903506560.

The previous prime is 20402042444011. The next prime is 20402042444023. The reversal of 20402042444020 is 2044424020402.

It is a self number, because there is not a number n which added to its sum of digits gives 20402042444020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402042444023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 865949275 + ... + 865972834.

It is an arithmetic number, because the mean of its divisors is an integer number (969876381600).

Almost surely, 2^{20402042444020} is an apocalyptic number.

20402042444020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20402042444020 is an abundant number, since it is smaller than the sum of its proper divisors (26152023872780).

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

20402042444020 is a wasteful number, since it uses less digits than its factorization.

20402042444020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731922168 (or 1731922166 counting only the distinct ones).

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

Adding to 20402042444020 its reverse (2044424020402), we get a palindrome (22446466464422).

The spelling of 20402042444020 in words is "twenty trillion, four hundred two billion, forty-two million, four hundred forty-four thousand, twenty".