20057647680 has 784 divisors, whose sum is σ = 83473161984. Its totient is φ = 4493905920.

The previous prime is 20057647669. The next prime is 20057647723. The reversal of 20057647680 is 8674675002.

20057647680 is a `hidden beast` number, since 2 + 0 + 0 + 576 + 4 + 76 + 8 + 0 = 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 111 ways as a sum of consecutive naturals, for example, 115940074 + ... + 115940246.

Almost surely, 2^20057647680 is an apocalyptic number.

20057647680 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 20057647680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41736580992).

20057647680 is an abundant number, since it is smaller than the sum of its proper divisors (63415514304).

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

20057647680 is an equidigital number, since it uses as much as digits as its factorization.

20057647680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 20057647680 in words is "twenty billion, fifty-seven million, six hundred forty-seven thousand, six hundred eighty".