20110689 has 12 divisors (see below), whose sum is σ = 29667456. Its totient is φ = 13121592.

The previous prime is 20110687. The next prime is 20110693. The reversal of 20110689 is 98601102.

20110689 = T₁₂₀₇ + T₁₂₀₈ + ... + T₁₂₃₃.

It is not a de Polignac number, because 20110689 - 2¹ = 20110687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20110687) 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 11 ways as a sum of consecutive naturals, for example, 23349 + ... + 24194.

It is an arithmetic number, because the mean of its divisors is an integer number (2472288).

Almost surely, 2^20110689 is an apocalyptic number.

It is an amenable number.

20110689 is a deficient number, since it is larger than the sum of its proper divisors (9556767).

20110689 is a wasteful number, since it uses less digits than its factorization.

20110689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47596 (or 47593 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 20110689 is about 4484.4942858699. The cubic root of 20110689 is about 271.9416009645.

The spelling of 20110689 in words is "twenty million, one hundred ten thousand, six hundred eighty-nine".