20481436 has 6 divisors (see below), whose sum is σ = 35842520. Its totient is φ = 10240716.

The previous prime is 20481403. The next prime is 20481451. The reversal of 20481436 is 63418402.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 2560176 + ... + 2560183.

Almost surely, 2^20481436 is an apocalyptic number.

It is an amenable number.

20481436 is a deficient number, since it is larger than the sum of its proper divisors (15361084).

20481436 is a wasteful number, since it uses less digits than its factorization.

20481436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5120363 (or 5120361 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 20481436 is about 4525.6420538969. The cubic root of 20481436 is about 273.6025459164.

Adding to 20481436 its reverse (63418402), we get a palindrome (83899838).

The spelling of 20481436 in words is "twenty million, four hundred eighty-one thousand, four hundred thirty-six".