20510075578677 has 8 divisors (see below), whose sum is σ = 27346807370016. Its totient is φ = 13673363753232.

The previous prime is 20510075578639. The next prime is 20510075578679. The reversal of 20510075578677 is 77687557001502.

It is a happy number.

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

It is not a de Polignac number, because 20510075578677 - 2⁴³ = 11713982556469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20510075578677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20510075578679) 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, 2402743 + ... + 6840564.

It is an arithmetic number, because the mean of its divisors is an integer number (3418350921252).

Almost surely, 2^{20510075578677} is an apocalyptic number.

It is an amenable number.

20510075578677 is a deficient number, since it is larger than the sum of its proper divisors (6836731791339).

20510075578677 is an equidigital number, since it uses as much as digits as its factorization.

20510075578677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9982947.

The product of its (nonzero) digits is 28812000, while the sum is 60.

The spelling of 20510075578677 in words is "twenty trillion, five hundred ten billion, seventy-five million, five hundred seventy-eight thousand, six hundred seventy-seven".