20171306140 has 24 divisors (see below), whose sum is σ = 44851493232. Its totient is φ = 7593903360.

The previous prime is 20171306117. The next prime is 20171306147. The reversal of 20171306140 is 4160317102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20171306147) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 29663346 + ... + 29664025.

It is an arithmetic number, because the mean of its divisors is an integer number (1868812218).

Almost surely, 2^20171306140 is an apocalyptic number.

20171306140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20171306140 is an abundant number, since it is smaller than the sum of its proper divisors (24680187092).

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

20171306140 is a wasteful number, since it uses less digits than its factorization.

20171306140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59327397 (or 59327395 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The spelling of 20171306140 in words is "twenty billion, one hundred seventy-one million, three hundred six thousand, one hundred forty".