20771116 has 24 divisors (see below), whose sum is σ = 39158784. Its totient is φ = 9612240.

The previous prime is 20771111. The next prime is 20771119. The reversal of 20771116 is 61117702.

It is not an unprimeable number, because it can be changed into a prime (20771111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 790 + ... + 6493.

It is an arithmetic number, because the mean of its divisors is an integer number (1631616).

Almost surely, 2^20771116 is an apocalyptic number.

It is an amenable number.

20771116 is a deficient number, since it is larger than the sum of its proper divisors (18387668).

20771116 is a wasteful number, since it uses less digits than its factorization.

20771116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7341 (or 7339 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 20771116 is about 4557.5339823198. The cubic root of 20771116 is about 274.8864147995.

Adding to 20771116 its reverse (61117702), we get a palindrome (81888818).

The spelling of 20771116 in words is "twenty million, seven hundred seventy-one thousand, one hundred sixteen".