20307529187 has 16 divisors (see below), whose sum is σ = 22480924032. Its totient is φ = 18190360320.

The previous prime is 20307529171. The next prime is 20307529223. The reversal of 20307529187 is 78192570302.

It is not a de Polignac number, because 20307529187 - 2⁴ = 20307529171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20307529087) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 200288 + ... + 284130.

It is an arithmetic number, because the mean of its divisors is an integer number (1405057752).

Almost surely, 2^20307529187 is an apocalyptic number.

20307529187 is a deficient number, since it is larger than the sum of its proper divisors (2173394845).

20307529187 is a wasteful number, since it uses less digits than its factorization.

20307529187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84178.

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 20307529187 in words is "twenty billion, three hundred seven million, five hundred twenty-nine thousand, one hundred eighty-seven".