19857895148 has 24 divisors (see below), whose sum is σ = 42770851872. Its totient is φ = 7855870464.

The previous prime is 19857895147. The next prime is 19857895159. The reversal of 19857895148 is 84159875891.

It is not an unprimeable number, because it can be changed into a prime (19857895147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27276965 + ... + 27277692.

It is an arithmetic number, because the mean of its divisors is an integer number (1782118828).

Almost surely, 2^19857895148 is an apocalyptic number.

It is an amenable number.

19857895148 is an abundant number, since it is smaller than the sum of its proper divisors (22912956724).

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

19857895148 is a wasteful number, since it uses less digits than its factorization.

19857895148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54554681 (or 54554679 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 65.

The spelling of 19857895148 in words is "nineteen billion, eight hundred fifty-seven million, eight hundred ninety-five thousand, one hundred forty-eight".