20531253070656 has 168 divisors, whose sum is σ = 60317525905728. Its totient is φ = 6673169664000.

The previous prime is 20531253070621. The next prime is 20531253070703. The reversal of 20531253070656 is 65607035213502.

20531253070656 is a `hidden beast` number, since 2 + 0 + 53 + 1 + 2 + 530 + 7 + 0 + 65 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 43003491 + ... + 43478301.

It is an arithmetic number, because the mean of its divisors is an integer number (359032892296).

Almost surely, 2^{20531253070656} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20531253070656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30158762952864).

20531253070656 is an abundant number, since it is smaller than the sum of its proper divisors (39786272835072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20531253070656 is a wasteful number, since it uses less digits than its factorization.

20531253070656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476701 (or 476688 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 45.

The spelling of 20531253070656 in words is "twenty trillion, five hundred thirty-one billion, two hundred fifty-three million, seventy thousand, six hundred fifty-six".