20117764 has 12 divisors (see below), whose sum is σ = 36420300. Its totient is φ = 9711968.

The previous prime is 20117759. The next prime is 20117777. The reversal of 20117764 is 46771102.

It can be written as a sum of positive squares in 2 ways, for example, as 14500864 + 5616900 = 3808^2 + 2370^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86599 + ... + 86830.

It is an arithmetic number, because the mean of its divisors is an integer number (3035025).

Almost surely, 2^20117764 is an apocalyptic number.

It is an amenable number.

20117764 is a deficient number, since it is larger than the sum of its proper divisors (16302536).

20117764 is a wasteful number, since it uses less digits than its factorization.

20117764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173462 (or 173460 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 20117764 is about 4485.2830456951. The cubic root of 20117764 is about 271.9734871793.

Adding to 20117764 its reverse (46771102), we get a palindrome (66888866).

The spelling of 20117764 in words is "twenty million, one hundred seventeen thousand, seven hundred sixty-four".