20540200 has 24 divisors (see below), whose sum is σ = 47756430. Its totient is φ = 8216000.

The previous prime is 20540171. The next prime is 20540209. The reversal of 20540200 is 204502.

It is a happy number.

20540200 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 3 ways, for example, as 15952036 + 4588164 = 3994^2 + 2142^2 .

It is not an unprimeable number, because it can be changed into a prime (20540209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51151 + ... + 51550.

Almost surely, 2^20540200 is an apocalyptic number.

20540200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20540200 is an abundant number, since it is smaller than the sum of its proper divisors (27216230).

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

20540200 is a wasteful number, since it uses less digits than its factorization.

20540200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102717 (or 102708 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 20540200 is about 4532.1297421852. The cubic root of 20540200 is about 273.8639635865.

Adding to 20540200 its reverse (204502), we get a palindrome (20744702).

The spelling of 20540200 in words is "twenty million, five hundred forty thousand, two hundred".