20116761 has 16 divisors (see below), whose sum is σ = 30732288. Its totient is φ = 11466000.

The previous prime is 20116757. The next prime is 20116771. The reversal of 20116761 is 16761102.

It is not a de Polignac number, because 20116761 - 2² = 20116757 is a prime.

It is a super-2 number, since 2×20116761² = 809368146262242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20116721) 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 15 ways as a sum of consecutive naturals, for example, 9336 + ... + 11286.

It is an arithmetic number, because the mean of its divisors is an integer number (1920768).

Almost surely, 2^20116761 is an apocalyptic number.

20116761 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20116761 is a deficient number, since it is larger than the sum of its proper divisors (10615527).

20116761 is a wasteful number, since it uses less digits than its factorization.

20116761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2452.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 20116761 is about 4485.1712341894. The cubic root of 20116761 is about 271.9689672280.

Adding to 20116761 its reverse (16761102), we get a palindrome (36877863).

The spelling of 20116761 in words is "twenty million, one hundred sixteen thousand, seven hundred sixty-one".