20402402420404 has 12 divisors (see below), whose sum is σ = 35704812243744. Its totient is φ = 10201027493624.

The previous prime is 20402402420381. The next prime is 20402402420429. The reversal of 20402402420404 is 40402420420402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43164712 + ... + 43634815.

It is an arithmetic number, because the mean of its divisors is an integer number (2975401020312).

Almost surely, 2^{20402402420404} is an apocalyptic number.

It is an amenable number.

20402402420404 is a deficient number, since it is larger than the sum of its proper divisors (15302409823340).

20402402420404 is a wasteful number, since it uses less digits than its factorization.

20402402420404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86858294 (or 86858292 counting only the distinct ones).

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

Adding to 20402402420404 its reverse (40402420420402), we get a palindrome (60804822840806).

It can be divided in two parts, 2040240 and 2420404, that added together give a palindrome (4460644).

The spelling of 20402402420404 in words is "twenty trillion, four hundred two billion, four hundred two million, four hundred twenty thousand, four hundred four".