20051572061277 has 6 divisors (see below), whose sum is σ = 28963381866302. Its totient is φ = 13367714707512.

The previous prime is 20051572061273. The next prime is 20051572061291. The reversal of 20051572061277 is 77216027515002.

20051572061277 is a `hidden beast` number, since 2 + 0 + 0 + 5 + 1 + 5 + 7 + 20 + 612 + 7 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20007272756601 + 44299304676 = 4472949^2 + 210474^2 .

It is not a de Polignac number, because 20051572061277 - 2² = 20051572061273 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 (20051572061273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1113976225618 + ... + 1113976225635.

Almost surely, 2^{20051572061277} is an apocalyptic number.

It is an amenable number.

20051572061277 is a deficient number, since it is larger than the sum of its proper divisors (8911809805025).

20051572061277 is a wasteful number, since it uses less digits than its factorization.

20051572061277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227952451259 (or 2227952451256 counting only the distinct ones).

The product of its (nonzero) digits is 411600, while the sum is 45.

Adding to 20051572061277 its reverse (77216027515002), we get a palindrome (97267599576279).

The spelling of 20051572061277 in words is "twenty trillion, fifty-one billion, five hundred seventy-two million, sixty-one thousand, two hundred seventy-seven".