20515076061077 has 8 divisors (see below), whose sum is σ = 22102777133976. Its totient is φ = 18928749030912.

The previous prime is 20515076061047. The next prime is 20515076061083. The reversal of 20515076061077 is 77016067051502.

It can be written as a sum of positive squares in 4 ways, for example, as 832375223716 + 19682700837361 = 912346^2 + 4436519^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20515076061077 - 2³⁰ = 20514002319253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20515076061047) 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, 343479668 + ... + 343539389.

It is an arithmetic number, because the mean of its divisors is an integer number (2762847141747).

Almost surely, 2^{20515076061077} is an apocalyptic number.

It is an amenable number.

20515076061077 is a deficient number, since it is larger than the sum of its proper divisors (1587701072899).

20515076061077 is a wasteful number, since it uses less digits than its factorization.

20515076061077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687021367.

The product of its (nonzero) digits is 617400, while the sum is 47.

The spelling of 20515076061077 in words is "twenty trillion, five hundred fifteen billion, seventy-six million, sixty-one thousand, seventy-seven".