20670505619577 has 8 divisors (see below), whose sum is σ = 30066189992160. Its totient is φ = 12527579163360.

The previous prime is 20670505619537. The next prime is 20670505619579. The reversal of 20670505619577 is 77591650507602.

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

It is not a de Polignac number, because 20670505619577 - 2⁸ = 20670505619321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20670505619577.

It is not an unprimeable number, because it can be changed into a prime (20670505619579) 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, 313189479052 + ... + 313189479117.

It is an arithmetic number, because the mean of its divisors is an integer number (3758273749020).

Almost surely, 2^{20670505619577} is an apocalyptic number.

It is an amenable number.

20670505619577 is a deficient number, since it is larger than the sum of its proper divisors (9395684372583).

20670505619577 is a wasteful number, since it uses less digits than its factorization.

20670505619577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626378958183.

The product of its (nonzero) digits is 27783000, while the sum is 60.

The spelling of 20670505619577 in words is "twenty trillion, six hundred seventy billion, five hundred five million, six hundred nineteen thousand, five hundred seventy-seven".