20003146221 has 16 divisors (see below), whose sum is σ = 27339687936. Its totient is φ = 13002121776.

The previous prime is 20003146199. The next prime is 20003146259. The reversal of 20003146221 is 12264130002.

It is not a de Polignac number, because 20003146221 - 2⁶ = 20003146157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003144221) 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, 65085 + ... + 210338.

It is an arithmetic number, because the mean of its divisors is an integer number (1708730496).

Almost surely, 2^20003146221 is an apocalyptic number.

It is an amenable number.

20003146221 is a deficient number, since it is larger than the sum of its proper divisors (7336541715).

20003146221 is a wasteful number, since it uses less digits than its factorization.

20003146221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276032.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20003146221 its reverse (12264130002), we get a palindrome (32267276223).

The spelling of 20003146221 in words is "twenty billion, three million, one hundred forty-six thousand, two hundred twenty-one".