20110681 has 4 divisors (see below), whose sum is σ = 20451600. Its totient is φ = 19769764.

The previous prime is 20110631. The next prime is 20110687. The reversal of 20110681 is 18601102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20110681 - 2⁷ = 20110553 is a prime.

It is a super-2 number, since 2×20110681² = 808878980567522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20110687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170371 + ... + 170488.

It is an arithmetic number, because the mean of its divisors is an integer number (5112900).

Almost surely, 2^20110681 is an apocalyptic number.

It is an amenable number.

20110681 is a deficient number, since it is larger than the sum of its proper divisors (340919).

20110681 is an equidigital number, since it uses as much as digits as its factorization.

20110681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340918.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 20110681 is about 4484.4933939075. The cubic root of 20110681 is about 271.9415649052.

Adding to 20110681 its reverse (18601102), we get a palindrome (38711783).

The spelling of 20110681 in words is "twenty million, one hundred ten thousand, six hundred eighty-one".