20532151872 has 168 divisors, whose sum is σ = 61692190560. Its totient is φ = 6521518080.

The previous prime is 20532151859. The next prime is 20532151889. The reversal of 20532151872 is 27815123502.

20532151872 is a `hidden beast` number, since 2 + 0 + 53 + 21 + 518 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1005379 + ... + 1025597.

It is an arithmetic number, because the mean of its divisors is an integer number (367215420).

Almost surely, 2^20532151872 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 20532151872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30846095280).

20532151872 is an abundant number, since it is smaller than the sum of its proper divisors (41160038688).

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

20532151872 is a wasteful number, since it uses less digits than its factorization.

20532151872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20321 (or 20308 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The spelling of 20532151872 in words is "twenty billion, five hundred thirty-two million, one hundred fifty-one thousand, eight hundred seventy-two".