20004115513221 has 12 divisors (see below), whose sum is σ = 33022666879072. Its totient is φ = 11430923150376.

The previous prime is 20004115513211. The next prime is 20004115513223. The reversal of 20004115513221 is 12231551140002.

It is a happy number.

20004115513221 is a `hidden beast` number, since 20 + 0 + 0 + 41 + 1 + 551 + 32 + 21 = 666.

It is not a de Polignac number, because 20004115513221 - 2¹⁰ = 20004115512197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004115513223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158762821471 + ... + 158762821596.

Almost surely, 2^{20004115513221} is an apocalyptic number.

20004115513221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20004115513221 is a deficient number, since it is larger than the sum of its proper divisors (13018551365851).

20004115513221 is a wasteful number, since it uses less digits than its factorization.

20004115513221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317525643080 (or 317525643077 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 20004115513221 its reverse (12231551140002), we get a palindrome (32235666653223).

The spelling of 20004115513221 in words is "twenty trillion, four billion, one hundred fifteen million, five hundred thirteen thousand, two hundred twenty-one".