20994318 has 48 divisors (see below), whose sum is σ = 48372480. Its totient is φ = 6568128.

The previous prime is 20994317. The next prime is 20994319. The reversal of 20994318 is 81349902.

It is an interprime number because it is at equal distance from previous prime (20994317) and next prime (20994319).

It is a super-3 number, since 3×20994318³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20994317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18771 + ... + 19857.

It is an arithmetic number, because the mean of its divisors is an integer number (1007760).

Almost surely, 2^20994318 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20994318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24186240).

20994318 is an abundant number, since it is smaller than the sum of its proper divisors (27378162).

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

20994318 is a wasteful number, since it uses less digits than its factorization.

20994318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161 (or 1158 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 20994318 is about 4581.9556959883. The cubic root of 20994318 is about 275.8675325251.

It can be divided in two parts, 20994 and 318, that added together give a palindrome (21312).

The spelling of 20994318 in words is "twenty million, nine hundred ninety-four thousand, three hundred eighteen".