20838018 has 16 divisors (see below), whose sum is σ = 41792256. Its totient is φ = 6926640.

The previous prime is 20838011. The next prime is 20838019. The reversal of 20838018 is 81083802.

It is not an unprimeable number, because it can be changed into a prime (20838011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2418 + ... + 6893.

It is an arithmetic number, because the mean of its divisors is an integer number (2612016).

Almost surely, 2^20838018 is an apocalyptic number.

20838018 is an abundant number, since it is smaller than the sum of its proper divisors (20954238).

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

20838018 is a wasteful number, since it uses less digits than its factorization.

20838018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9689.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 20838018 is about 4564.8677965523. The cubic root of 20838018 is about 275.1812271002.

It can be divided in two parts, 2083 and 8018, that added together give a palindrome (10101).

The spelling of 20838018 in words is "twenty million, eight hundred thirty-eight thousand, eighteen".