20157745000 has 80 divisors (see below), whose sum is σ = 47544156000. Its totient is φ = 8009400000.

The previous prime is 20157744967. The next prime is 20157745001. The reversal of 20157745000 is 54775102.

It is not an unprimeable number, because it can be changed into a prime (20157745001) 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 19 ways as a sum of consecutive naturals, for example, 741651 + ... + 768349.

It is an arithmetic number, because the mean of its divisors is an integer number (594301950).

Almost surely, 2^20157745000 is an apocalyptic number.

20157745000 is a gapful number since it is divisible by the number (20) 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 20157745000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23772078000).

20157745000 is an abundant number, since it is smaller than the sum of its proper divisors (27386411000).

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

20157745000 is a wasteful number, since it uses less digits than its factorization.

20157745000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26876 (or 26857 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 31.

The spelling of 20157745000 in words is "twenty billion, one hundred fifty-seven million, seven hundred forty-five thousand".