20130340 has 24 divisors (see below), whose sum is σ = 42517440. Its totient is φ = 8005728.

The previous prime is 20130293. The next prime is 20130343. The reversal of 20130340 is 4303102.

It is a self number, because there is not a number n which added to its sum of digits gives 20130340.

It is not an unprimeable number, because it can be changed into a prime (20130343) 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, 769 + ... + 6391.

It is an arithmetic number, because the mean of its divisors is an integer number (1771560).

Almost surely, 2^20130340 is an apocalyptic number.

20130340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20130340 is an abundant number, since it is smaller than the sum of its proper divisors (22387100).

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

20130340 is a wasteful number, since it uses less digits than its factorization.

20130340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5811 (or 5809 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20130340 is about 4486.6847448868. The cubic root of 20130340 is about 272.0301473217.

Adding to 20130340 its reverse (4303102), we get a palindrome (24433442).

The spelling of 20130340 in words is "twenty million, one hundred thirty thousand, three hundred forty".