20280339774720 has 360 divisors, whose sum is σ = 72598250340000. Its totient is φ = 5405744148480.

The previous prime is 20280339774719. The next prime is 20280339774769. The reversal of 20280339774720 is 2747793308202.

It is a happy number.

20280339774720 is a `hidden beast` number, since 2 + 0 + 2 + 80 + 3 + 3 + 97 + 7 + 472 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a super-2 number, since 2×20280339774720² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 245784031 + ... + 245866529.

It is an arithmetic number, because the mean of its divisors is an integer number (201661806500).

Almost surely, 2^{20280339774720} is an apocalyptic number.

20280339774720 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 20280339774720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36299125170000).

20280339774720 is an abundant number, since it is smaller than the sum of its proper divisors (52317910565280).

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

20280339774720 is an equidigital number, since it uses as much as digits as its factorization.

20280339774720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84903 (or 84880 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 54.

The spelling of 20280339774720 in words is "twenty trillion, two hundred eighty billion, three hundred thirty-nine million, seven hundred seventy-four thousand, seven hundred twenty".