20540511284 has 12 divisors (see below), whose sum is σ = 37508759904. Its totient is φ = 9823722744.

The previous prime is 20540511223. The next prime is 20540511289. The reversal of 20540511284 is 48211504502.

It is a self number, because there is not a number n which added to its sum of digits gives 20540511284.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540511289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111633122 + ... + 111633305.

It is an arithmetic number, because the mean of its divisors is an integer number (3125729992).

Almost surely, 2^20540511284 is an apocalyptic number.

It is an amenable number.

20540511284 is a deficient number, since it is larger than the sum of its proper divisors (16968248620).

20540511284 is a wasteful number, since it uses less digits than its factorization.

20540511284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223266454 (or 223266452 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The spelling of 20540511284 in words is "twenty billion, five hundred forty million, five hundred eleven thousand, two hundred eighty-four".