20540252 has 6 divisors (see below), whose sum is σ = 35945448. Its totient is φ = 10270124.

The previous prime is 20540251. The next prime is 20540279. The reversal of 20540252 is 25204502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2567528 + ... + 2567535.

It is an arithmetic number, because the mean of its divisors is an integer number (5990908).

Almost surely, 2^20540252 is an apocalyptic number.

It is an amenable number.

20540252 is a deficient number, since it is larger than the sum of its proper divisors (15405196).

20540252 is a wasteful number, since it uses less digits than its factorization.

20540252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5135067 (or 5135065 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 20540252 is about 4532.1354789988. The cubic root of 20540252 is about 273.8641946929.

Adding to 20540252 its reverse (25204502), we get a palindrome (45744754).

The spelling of 20540252 in words is "twenty million, five hundred forty thousand, two hundred fifty-two".