20109523392 has 672 divisors, whose sum is σ = 73719659520. Its totient is φ = 5109350400.

The previous prime is 20109523381. The next prime is 20109523409. The reversal of 20109523392 is 29332590102.

20109523392 is a `hidden beast` number, since 20 + 109 + 523 + 3 + 9 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 177960328 + ... + 177960440.

Almost surely, 2^20109523392 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 20109523392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36859829760).

20109523392 is an abundant number, since it is smaller than the sum of its proper divisors (53610136128).

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

20109523392 is a wasteful number, since it uses less digits than its factorization.

20109523392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The spelling of 20109523392 in words is "twenty billion, one hundred nine million, five hundred twenty-three thousand, three hundred ninety-two".