20547648 has 224 divisors, whose sum is σ = 70225920. Its totient is φ = 5829120.

The previous prime is 20547647. The next prime is 20547661. The reversal of 20547648 is 84674502.

20547648 is a `hidden beast` number, since 2 + 0 + 5 + 4 + 7 + 648 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20547647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 437161 + ... + 437207.

Almost surely, 2^20547648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20547648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35112960).

20547648 is an abundant number, since it is smaller than the sum of its proper divisors (49678272).

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

20547648 is a wasteful number, since it uses less digits than its factorization.

20547648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 20547648 is about 4532.9513564564. The cubic root of 20547648 is about 273.8970611596.

The spelling of 20547648 in words is "twenty million, five hundred forty-seven thousand, six hundred forty-eight".