20036340 has 72 divisors (see below), whose sum is σ = 61250280. Its totient is φ = 5301504.

The previous prime is 20036333. The next prime is 20036371. The reversal of 20036340 is 4363002.

It can be written as a sum of positive squares in 4 ways, for example, as 1764 + 20034576 = 42^2 + 4476^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27906 + ... + 28614.

Almost surely, 2^20036340 is an apocalyptic number.

20036340 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 20036340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30625140).

20036340 is an abundant number, since it is smaller than the sum of its proper divisors (41213940).

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

20036340 is a wasteful number, since it uses less digits than its factorization.

20036340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881 (or 876 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 20036340 is about 4476.1970466011. The cubic root of 20036340 is about 271.6060654133.

Adding to 20036340 its reverse (4363002), we get a palindrome (24399342).

The spelling of 20036340 in words is "twenty million, thirty-six thousand, three hundred forty".