20116577 has 6 divisors (see below), whose sum is σ = 21783222. Its totient is φ = 18568992.

The previous prime is 20116543. The next prime is 20116619. The reversal of 20116577 is 77561102.

It can be written as a sum of positive squares in 3 ways, for example, as 126736 + 19989841 = 356^2 + 4471^2 .

It is not a de Polignac number, because 20116577 - 2¹⁰ = 20115553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20116177) 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, 59348 + ... + 59685.

It is an arithmetic number, because the mean of its divisors is an integer number (3630537).

Almost surely, 2^20116577 is an apocalyptic number.

It is an amenable number.

20116577 is a deficient number, since it is larger than the sum of its proper divisors (1666645).

20116577 is a wasteful number, since it uses less digits than its factorization.

20116577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119059 (or 119046 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 20116577 is about 4485.1507221051. The cubic root of 20116577 is about 271.9681380282.

Adding to 20116577 its reverse (77561102), we get a palindrome (97677679).

The spelling of 20116577 in words is "twenty million, one hundred sixteen thousand, five hundred seventy-seven".