20531676630720 has 448 divisors, whose sum is σ = 72044209520640. Its totient is φ = 4927595937792.

The previous prime is 20531676630683. The next prime is 20531676630721. The reversal of 20531676630720 is 2703667613502.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 20531676630720.

It is not an unprimeable number, because it can be changed into a prime (20531676630721) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1992781089 + ... + 1992791391.

It is an arithmetic number, because the mean of its divisors is an integer number (160812967680).

Almost surely, 2^{20531676630720} is an apocalyptic number.

20531676630720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20531676630720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36022104760320).

20531676630720 is an abundant number, since it is smaller than the sum of its proper divisors (51512532889920).

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

20531676630720 is a wasteful number, since it uses less digits than its factorization.

20531676630720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15672 (or 15662 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 48.

The spelling of 20531676630720 in words is "twenty trillion, five hundred thirty-one billion, six hundred seventy-six million, six hundred thirty thousand, seven hundred twenty".