20713332437280 has 768 divisors, whose sum is σ = 87850635264000. Its totient is φ = 4449700528128.

The previous prime is 20713332437267. The next prime is 20713332437309. The reversal of 20713332437280 is 8273423331702.

20713332437280 is a `hidden beast` number, since 2 + 0 + 7 + 1 + 3 + 332 + 4 + 37 + 280 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 369595501 + ... + 369651539.

It is an arithmetic number, because the mean of its divisors is an integer number (114388848000).

Almost surely, 2^{20713332437280} is an apocalyptic number.

20713332437280 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 20713332437280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43925317632000).

20713332437280 is an abundant number, since it is smaller than the sum of its proper divisors (67137302826720).

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

20713332437280 is a wasteful number, since it uses less digits than its factorization.

20713332437280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56806 (or 56792 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 45.

Adding to 20713332437280 its reverse (8273423331702), we get a palindrome (28986755768982).

The spelling of 20713332437280 in words is "twenty trillion, seven hundred thirteen billion, three hundred thirty-two million, four hundred thirty-seven thousand, two hundred eighty".