20109360 has 80 divisors (see below), whose sum is σ = 65067264. Its totient is φ = 5127936.

The previous prime is 20109343. The next prime is 20109377. The reversal of 20109360 is 6390102.

It is an interprime number because it is at equal distance from previous prime (20109343) and next prime (20109377).

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3699 + ... + 7341.

Almost surely, 2^20109360 is an apocalyptic number.

20109360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20109360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32533632).

20109360 is an abundant number, since it is smaller than the sum of its proper divisors (44957904).

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

20109360 is a wasteful number, since it uses less digits than its factorization.

20109360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3682 (or 3676 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 20109360 is about 4484.3461061787. The cubic root of 20109360 is about 271.9356104794.

Adding to 20109360 its reverse (6390102), we get a palindrome (26499462).

The spelling of 20109360 in words is "twenty million, one hundred nine thousand, three hundred sixty".