19858043492 has 24 divisors (see below), whose sum is σ = 40109321280. Its totient is φ = 8426325600.

The previous prime is 19858043483. The next prime is 19858043497. The reversal of 19858043492 is 29434085891.

It is not an unprimeable number, because it can be changed into a prime (19858043497) 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, 3508142 + ... + 3513797.

It is an arithmetic number, because the mean of its divisors is an integer number (1671221720).

Almost surely, 2^19858043492 is an apocalyptic number.

It is an amenable number.

19858043492 is an abundant number, since it is smaller than the sum of its proper divisors (20251277788).

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

19858043492 is a wasteful number, since it uses less digits than its factorization.

19858043492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7022051 (or 7022049 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 19858043492 in words is "nineteen billion, eight hundred fifty-eight million, forty-three thousand, four hundred ninety-two".