20647732355460 has 384 divisors, whose sum is σ = 75204826583040. Its totient is φ = 4604611027968.

The previous prime is 20647732355441. The next prime is 20647732355477. The reversal of 20647732355460 is 6455323774602.

20647732355460 is a `hidden beast` number, since 2 + 0 + 6 + 4 + 7 + 7 + 3 + 23 + 554 + 60 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 20647732355397 and 20647732355406.

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, 147353752 + ... + 147493808.

It is an arithmetic number, because the mean of its divisors is an integer number (195845902560).

Almost surely, 2^{20647732355460} is an apocalyptic number.

20647732355460 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 20647732355460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37602413291520).

20647732355460 is an abundant number, since it is smaller than the sum of its proper divisors (54557094227580).

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

20647732355460 is a wasteful number, since it uses less digits than its factorization.

20647732355460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141032 (or 141024 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 54.

The spelling of 20647732355460 in words is "twenty trillion, six hundred forty-seven billion, seven hundred thirty-two million, three hundred fifty-five thousand, four hundred sixty".