20541340 has 12 divisors (see below), whose sum is σ = 43136856. Its totient is φ = 8216528.

The previous prime is 20541331. The next prime is 20541347. The reversal of 20541340 is 4314502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513514 + ... + 513553.

It is an arithmetic number, because the mean of its divisors is an integer number (3594738).

Almost surely, 2^20541340 is an apocalyptic number.

20541340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20541340 is an abundant number, since it is smaller than the sum of its proper divisors (22595516).

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

20541340 is a wasteful number, since it uses less digits than its factorization.

20541340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027076 (or 1027074 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20541340 is about 4532.2555091257. The cubic root of 20541340 is about 273.8690300601.

Adding to 20541340 its reverse (4314502), we get a palindrome (24855842).

The spelling of 20541340 in words is "twenty million, five hundred forty-one thousand, three hundred forty".