20540036 has 12 divisors (see below), whose sum is σ = 39212880. Its totient is φ = 9336360.

The previous prime is 20540017. The next prime is 20540053. The reversal of 20540036 is 63004502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233366 + ... + 233453.

It is an arithmetic number, because the mean of its divisors is an integer number (3267740).

Almost surely, 2^20540036 is an apocalyptic number.

It is an amenable number.

20540036 is a deficient number, since it is larger than the sum of its proper divisors (18672844).

20540036 is a wasteful number, since it uses less digits than its factorization.

20540036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466834 (or 466832 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20540036 is about 4532.1116491102. Note that the first 3 decimals coincide. The cubic root of 20540036 is about 273.8632347100.

Adding to 20540036 its reverse (63004502), we get a palindrome (83544538).

The spelling of 20540036 in words is "twenty million, five hundred forty thousand, thirty-six".