20003340 has 96 divisors (see below), whose sum is σ = 64802304. Its totient is φ = 4515840.

The previous prime is 20003317. The next prime is 20003369. The reversal of 20003340 is 4330002.

It is a super-2 number, since 2×20003340² = 800267222311200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40495 + ... + 40985.

It is an arithmetic number, because the mean of its divisors is an integer number (675024).

Almost surely, 2^20003340 is an apocalyptic number.

20003340 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 20003340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32401152).

20003340 is an abundant number, since it is smaller than the sum of its proper divisors (44798964).

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

20003340 is a wasteful number, since it uses less digits than its factorization.

20003340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 20003340 is about 4472.5093627627. The cubic root of 20003340 is about 271.4568710765.

Adding to 20003340 its reverse (4330002), we get a palindrome (24333342).

The spelling of 20003340 in words is "twenty million, three thousand, three hundred forty".