20534450123344 has 20 divisors (see below), whose sum is σ = 39798924643296. Its totient is φ = 10263759892832.

The previous prime is 20534450123237. The next prime is 20534450123347. The reversal of 20534450123344 is 44332105443502.

It is a junction number, because it is equal to n+sod(n) for n = 20534450123297 and 20534450123306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20534450123347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216524164 + ... + 216618979.

Almost surely, 2^{20534450123344} is an apocalyptic number.

It is an amenable number.

20534450123344 is a deficient number, since it is larger than the sum of its proper divisors (19264474519952).

20534450123344 is a wasteful number, since it uses less digits than its factorization.

20534450123344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433146114 (or 433146108 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 40.

Adding to 20534450123344 its reverse (44332105443502), we get a palindrome (64866555566846).

The spelling of 20534450123344 in words is "twenty trillion, five hundred thirty-four billion, four hundred fifty million, one hundred twenty-three thousand, three hundred forty-four".