20003512637217 has 4 divisors (see below), whose sum is σ = 26671350182960. Its totient is φ = 13335675091476.

The previous prime is 20003512637209. The next prime is 20003512637219. The reversal of 20003512637217 is 71273621530002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20003512637217 - 2³ = 20003512637209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20003512637219) 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, 3333918772867 + ... + 3333918772872.

It is an arithmetic number, because the mean of its divisors is an integer number (6667837545740).

Almost surely, 2^{20003512637217} is an apocalyptic number.

It is an amenable number.

20003512637217 is a deficient number, since it is larger than the sum of its proper divisors (6667837545743).

20003512637217 is an equidigital number, since it uses as much as digits as its factorization.

20003512637217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6667837545742.

The product of its (nonzero) digits is 105840, while the sum is 39.

The spelling of 20003512637217 in words is "twenty trillion, three billion, five hundred twelve million, six hundred thirty-seven thousand, two hundred seventeen".