20660542484 has 12 divisors (see below), whose sum is σ = 36386243124. Its totient is φ = 10264473024.

The previous prime is 20660542453. The next prime is 20660542489. The reversal of 20660542484 is 48424506602.

It can be written as a sum of positive squares in 2 ways, for example, as 1938640900 + 18721901584 = 44030^2 + 136828^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20660542489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16448849 + ... + 16450104.

It is an arithmetic number, because the mean of its divisors is an integer number (3032186927).

Almost surely, 2^20660542484 is an apocalyptic number.

It is an amenable number.

20660542484 is a deficient number, since it is larger than the sum of its proper divisors (15725700640).

20660542484 is a wasteful number, since it uses less digits than its factorization.

20660542484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32899114 (or 32899112 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 41.

The spelling of 20660542484 in words is "twenty billion, six hundred sixty million, five hundred forty-two thousand, four hundred eighty-four".