20147871744 has 1008 divisors, whose sum is σ = 82027715040. Its totient is φ = 4830658560.

The previous prime is 20147871673. The next prime is 20147871749. The reversal of 20147871744 is 44717874102.

20147871744 is a `hidden beast` number, since 2 + 0 + 1 + 478 + 7 + 174 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (1008).

It is a self number, because there is not a number n which added to its sum of digits gives 20147871744.

It is not an unprimeable number, because it can be changed into a prime (20147871749) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1549836282 + ... + 1549836294.

Almost surely, 2^20147871744 is an apocalyptic number.

20147871744 is a gapful number since it is divisible by the number (24) 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 20147871744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41013857520).

20147871744 is an abundant number, since it is smaller than the sum of its proper divisors (61879843296).

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

20147871744 is a wasteful number, since it uses less digits than its factorization.

20147871744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 45.

The spelling of 20147871744 in words is "twenty billion, one hundred forty-seven million, eight hundred seventy-one thousand, seven hundred forty-four".