20068636451472 has 320 divisors, whose sum is σ = 66352593162240. Its totient is φ = 5688744182784.

The previous prime is 20068636451443. The next prime is 20068636451489. The reversal of 20068636451472 is 27415463686002.

20068636451472 is a `hidden beast` number, since 2 + 0 + 0 + 6 + 8 + 63 + 64 + 51 + 472 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 765176823 + ... + 765203049.

It is an arithmetic number, because the mean of its divisors is an integer number (207351853632).

Almost surely, 2^{20068636451472} 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 20068636451472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33176296581120).

20068636451472 is an abundant number, since it is smaller than the sum of its proper divisors (46283956710768).

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

20068636451472 is a wasteful number, since it uses less digits than its factorization.

20068636451472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28235 (or 28223 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 54.

The spelling of 20068636451472 in words is "twenty trillion, sixty-eight billion, six hundred thirty-six million, four hundred fifty-one thousand, four hundred seventy-two".