20681118 has 24 divisors (see below), whose sum is σ = 46355400. Its totient is φ = 6655824.

The previous prime is 20681107. The next prime is 20681137. The reversal of 20681118 is 81118602.

It is a junction number, because it is equal to n+sod(n) for n = 20681091 and 20681100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19288 + ... + 20331.

It is an arithmetic number, because the mean of its divisors is an integer number (1931475).

Almost surely, 2^20681118 is an apocalyptic number.

20681118 is an abundant number, since it is smaller than the sum of its proper divisors (25674282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20681118 is a wasteful number, since it uses less digits than its factorization.

20681118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39656 (or 39653 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 20681118 is about 4547.6497226589. The cubic root of 20681118 is about 274.4888267223.

The spelling of 20681118 in words is "twenty million, six hundred eighty-one thousand, one hundred eighteen".