20201340 has 24 divisors (see below), whose sum is σ = 56563920. Its totient is φ = 5387008.

The previous prime is 20201329. The next prime is 20201341. The reversal of 20201340 is 4310202.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201341) 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, 168285 + ... + 168404.

It is an arithmetic number, because the mean of its divisors is an integer number (2356830).

Almost surely, 2^20201340 is an apocalyptic number.

20201340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201340 is an abundant number, since it is smaller than the sum of its proper divisors (36362580).

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

20201340 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 9 representation: 20201340 = (42010023)₉.

20201340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336701 (or 336699 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20201340 is about 4494.5900814201. The cubic root of 20201340 is about 272.3495901422.

Adding to 20201340 its reverse (4310202), we get a palindrome (24511542).

The spelling of 20201340 in words is "twenty million, two hundred one thousand, three hundred forty".