20438463283156 has 48 divisors (see below), whose sum is σ = 38071145145600. Its totient is φ = 9567362787840.

The previous prime is 20438463283141. The next prime is 20438463283157. The reversal of 20438463283156 is 65138236483402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20438463283097 and 20438463283106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20438463283157) 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, 54224361 + ... + 54599983.

It is an arithmetic number, because the mean of its divisors is an integer number (793148857200).

Almost surely, 2^{20438463283156} is an apocalyptic number.

It is an amenable number.

20438463283156 is a deficient number, since it is larger than the sum of its proper divisors (17632681862444).

20438463283156 is a wasteful number, since it uses less digits than its factorization.

20438463283156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379864 (or 379862 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 55.

The spelling of 20438463283156 in words is "twenty trillion, four hundred thirty-eight billion, four hundred sixty-three million, two hundred eighty-three thousand, one hundred fifty-six".