20548417680 has 480 divisors, whose sum is σ = 81875259648. Its totient is φ = 4520448000.

The previous prime is 20548417619. The next prime is 20548417763. The reversal of 20548417680 is 8671484502.

20548417680 is a `hidden beast` number, since 2 + 0 + 548 + 41 + 7 + 68 + 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 95 ways as a sum of consecutive naturals, for example, 18833935 + ... + 18835025.

Almost surely, 2^20548417680 is an apocalyptic number.

20548417680 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 20548417680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40937629824).

20548417680 is an abundant number, since it is smaller than the sum of its proper divisors (61326841968).

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

20548417680 is a wasteful number, since it uses less digits than its factorization.

20548417680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255 (or 1246 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The spelling of 20548417680 in words is "twenty billion, five hundred forty-eight million, four hundred seventeen thousand, six hundred eighty".