20118680 has 32 divisors (see below), whose sum is σ = 45476640. Its totient is φ = 8010240.

The previous prime is 20118677. The next prime is 20118733. The reversal of 20118680 is 8681102.

It is a super-2 number, since 2×20118680² = 809522569884800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8597 + ... + 10683.

It is an arithmetic number, because the mean of its divisors is an integer number (1421145).

Almost surely, 2^20118680 is an apocalyptic number.

20118680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20118680 is an abundant number, since it is smaller than the sum of its proper divisors (25357960).

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

20118680 is a wasteful number, since it uses less digits than its factorization.

20118680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339 (or 2335 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 20118680 is about 4485.3851562603. The cubic root of 20118680 is about 271.9776149398.

Adding to 20118680 its reverse (8681102), we get a palindrome (28799782).

It can be divided in two parts, 201 and 18680, that added together give a palindrome (18881).

The spelling of 20118680 in words is "twenty million, one hundred eighteen thousand, six hundred eighty".