20164447015272 has 160 divisors (see below), whose sum is σ = 64612716664320. Its totient is φ = 5755455699840.

The previous prime is 20164447015259. The next prime is 20164447015277. The reversal of 20164447015272 is 27251074446102.

20164447015272 is a `hidden beast` number, since 2 + 0 + 1 + 64 + 4 + 470 + 1 + 52 + 72 = 666.

It is not an unprimeable number, because it can be changed into a prime (20164447015277) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2252278 + ... + 6738074.

It is an arithmetic number, because the mean of its divisors is an integer number (403829479152).

Almost surely, 2^{20164447015272} 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 20164447015272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32306358332160).

20164447015272 is an abundant number, since it is smaller than the sum of its proper divisors (44448269649048).

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

20164447015272 is a wasteful number, since it uses less digits than its factorization.

20164447015272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4486813 (or 4486800 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The spelling of 20164447015272 in words is "twenty trillion, one hundred sixty-four billion, four hundred forty-seven million, fifteen thousand, two hundred seventy-two".