20159553384 has 96 divisors (see below), whose sum is σ = 56307069000. Its totient is φ = 6511810560.

The previous prime is 20159553371. The next prime is 20159553391. The reversal of 20159553384 is 48335595102.

20159553384 is a `hidden beast` number, since 2 + 0 + 1 + 595 + 53 + 3 + 8 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9316496484 + 10843056900 = 96522^2 + 104130^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 416932 + ... + 462764.

Almost surely, 2^20159553384 is an apocalyptic number.

20159553384 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 20159553384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28153534500).

20159553384 is an abundant number, since it is smaller than the sum of its proper divisors (36147515616).

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

20159553384 is a wasteful number, since it uses less digits than its factorization.

20159553384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46035 (or 46028 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 20159553384 in words is "twenty billion, one hundred fifty-nine million, five hundred fifty-three thousand, three hundred eighty-four".