20500421430044 has 12 divisors (see below), whose sum is σ = 35876607991224. Its totient is φ = 10249962003984.

The previous prime is 20500421429989. The next prime is 20500421430089. The reversal of 20500421430044 is 44003412400502.

It is a junction number, because it is equal to n+sod(n) for n = 20500421429989 and 20500421430016.

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, 61992239 + ... + 62322054.

It is an arithmetic number, because the mean of its divisors is an integer number (2989717332602).

Almost surely, 2^{20500421430044} is an apocalyptic number.

It is an amenable number.

20500421430044 is a deficient number, since it is larger than the sum of its proper divisors (15376186561180).

20500421430044 is a wasteful number, since it uses less digits than its factorization.

20500421430044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124355524 (or 124355522 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 20500421430044 its reverse (44003412400502), we get a palindrome (64503833830546).

The spelling of 20500421430044 in words is "twenty trillion, five hundred billion, four hundred twenty-one million, four hundred thirty thousand, forty-four".