20530484780581 has 8 divisors (see below), whose sum is σ = 20549995424000. Its totient is φ = 20510974710000.

The previous prime is 20530484780549. The next prime is 20530484780681. The reversal of 20530484780581 is 18508748403502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20530484780581 - 2⁵ = 20530484780549 is a prime.

It is a super-2 number, since 2×20530484780581² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530484780501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116166520 + ... + 116343118.

It is an arithmetic number, because the mean of its divisors is an integer number (2568749428000).

Almost surely, 2^{20530484780581} is an apocalyptic number.

It is an amenable number.

20530484780581 is a deficient number, since it is larger than the sum of its proper divisors (19510643419).

20530484780581 is a wasteful number, since it uses less digits than its factorization.

20530484780581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286419.

The product of its (nonzero) digits is 8601600, while the sum is 55.

The spelling of 20530484780581 in words is "twenty trillion, five hundred thirty billion, four hundred eighty-four million, seven hundred eighty thousand, five hundred eighty-one".