20681096 has 8 divisors (see below), whose sum is σ = 38777070. Its totient is φ = 10340544.

The previous prime is 20681083. The next prime is 20681107. The reversal of 20681096 is 69018602.

It can be written as a sum of positive squares in only one way, i.e., 11764900 + 8916196 = 3430^2 + 2986^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20681096² = 855415463522432, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 1292561 + ... + 1292576.

Almost surely, 2^20681096 is an apocalyptic number.

It is an amenable number.

20681096 is a deficient number, since it is larger than the sum of its proper divisors (18095974).

20681096 is a wasteful number, since it uses less digits than its factorization.

20681096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585143 (or 2585139 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 20681096 is about 4547.6473038265. The cubic root of 20681096 is about 274.4887293911.

Adding to 20681096 its reverse (69018602), we get a palindrome (89699698).

The spelling of 20681096 in words is "twenty million, six hundred eighty-one thousand, ninety-six".