20541140 has 48 divisors (see below), whose sum is σ = 44528400. Its totient is φ = 7956480.

The previous prime is 20541121. The next prime is 20541149. The reversal of 20541140 is 4114502.

It can be written as a sum of positive squares in 8 ways, for example, as 12945604 + 7595536 = 3598^2 + 2756^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137786 + ... + 137934.

It is an arithmetic number, because the mean of its divisors is an integer number (927675).

Almost surely, 2^20541140 is an apocalyptic number.

20541140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20541140 is an abundant number, since it is smaller than the sum of its proper divisors (23987260).

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

20541140 is a wasteful number, since it uses less digits than its factorization.

20541140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 20541140 is about 4532.2334450026. The cubic root of 20541140 is about 273.8681412186.

Adding to 20541140 its reverse (4114502), we get a palindrome (24655642).

The spelling of 20541140 in words is "twenty million, five hundred forty-one thousand, one hundred forty".