20540336 has 10 divisors (see below), whose sum is σ = 39796932. Its totient is φ = 10270160.

The previous prime is 20540329. The next prime is 20540339. The reversal of 20540336 is 63304502.

It is not an unprimeable number, because it can be changed into a prime (20540339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641870 + ... + 641901.

Almost surely, 2^20540336 is an apocalyptic number.

It is an amenable number.

20540336 is a deficient number, since it is larger than the sum of its proper divisors (19256596).

20540336 is a wasteful number, since it uses less digits than its factorization.

20540336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283779 (or 1283773 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 20540336 is about 4532.1447461439. The cubic root of 20540336 is about 273.8645680178.

Adding to 20540336 its reverse (63304502), we get a palindrome (83844838).

The spelling of 20540336 in words is "twenty million, five hundred forty thousand, three hundred thirty-six".