20115044421 has 8 divisors (see below), whose sum is σ = 26821534080. Its totient is φ = 13409292192.

The previous prime is 20115044401. The next prime is 20115044449. The reversal of 20115044421 is 12444051102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20115044421 - 2³¹ = 17967560773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20115044391 and 20115044400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115044401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117216 + ... + 232313.

It is an arithmetic number, because the mean of its divisors is an integer number (3352691760).

Almost surely, 2^20115044421 is an apocalyptic number.

It is an amenable number.

20115044421 is a deficient number, since it is larger than the sum of its proper divisors (6706489659).

20115044421 is a wasteful number, since it uses less digits than its factorization.

20115044421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368715.

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 20115044421 its reverse (12444051102), we get a palindrome (32559095523).

The spelling of 20115044421 in words is "twenty billion, one hundred fifteen million, forty-four thousand, four hundred twenty-one".