19157809543 has 32 divisors (see below), whose sum is σ = 20849633280. Its totient is φ = 17558280960.

The previous prime is 19157809537. The next prime is 19157809549. The reversal of 19157809543 is 34590875191.

It is an interprime number because it is at equal distance from previous prime (19157809537) and next prime (19157809549).

It is not a de Polignac number, because 19157809543 - 2²⁹ = 18620938631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19157809549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10293433 + ... + 10295293.

It is an arithmetic number, because the mean of its divisors is an integer number (651551040).

Almost surely, 2^19157809543 is an apocalyptic number.

19157809543 is a deficient number, since it is larger than the sum of its proper divisors (1691823737).

19157809543 is a wasteful number, since it uses less digits than its factorization.

19157809543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127.

The product of its (nonzero) digits is 1360800, while the sum is 52.

The spelling of 19157809543 in words is "nineteen billion, one hundred fifty-seven million, eight hundred nine thousand, five hundred forty-three".