20670505620601 has 4 divisors (see below), whose sum is σ = 20670516202752. Its totient is φ = 20670495038452.

The previous prime is 20670505620587. The next prime is 20670505620623. The reversal of 20670505620601 is 10602650507602.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20670505620601 - 2¹⁵ = 20670505587833 is a prime.

It is a super-2 number, since 2×20670505620601² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20670505620641) 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, 1414165 + ... + 6583378.

It is an arithmetic number, because the mean of its divisors is an integer number (5167629050688).

Almost surely, 2^{20670505620601} is an apocalyptic number.

It is an amenable number.

20670505620601 is a deficient number, since it is larger than the sum of its proper divisors (10582151).

20670505620601 is an equidigital number, since it uses as much as digits as its factorization.

20670505620601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10582150.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 20670505620601 in words is "twenty trillion, six hundred seventy billion, five hundred five million, six hundred twenty thousand, six hundred one".