20357257188 has 48 divisors (see below), whose sum is σ = 48817669824. Its totient is φ = 6598632960.

The previous prime is 20357257183. The next prime is 20357257307. The reversal of 20357257188 is 88175275302.

It is not an unprimeable number, because it can be changed into a prime (20357257183) 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, 83656 + ... + 218432.

It is an arithmetic number, because the mean of its divisors is an integer number (1017034788).

Almost surely, 2^20357257188 is an apocalyptic number.

It is an amenable number.

20357257188 is an abundant number, since it is smaller than the sum of its proper divisors (28460412636).

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

20357257188 is a wasteful number, since it uses less digits than its factorization.

20357257188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135132 (or 135130 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 48.

The spelling of 20357257188 in words is "twenty billion, three hundred fifty-seven million, two hundred fifty-seven thousand, one hundred eighty-eight".