19018883857 has 16 divisors (see below), whose sum is σ = 19578746880. Its totient is φ = 18469648512.

The previous prime is 19018883831. The next prime is 19018883861. The reversal of 19018883857 is 75838881091.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19018883857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19018883827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1140693 + ... + 1157245.

It is an arithmetic number, because the mean of its divisors is an integer number (1223671680).

Almost surely, 2^19018883857 is an apocalyptic number.

It is an amenable number.

19018883857 is a deficient number, since it is larger than the sum of its proper divisors (559863023).

19018883857 is a wasteful number, since it uses less digits than its factorization.

19018883857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16872.

The product of its (nonzero) digits is 3870720, while the sum is 58.

The spelling of 19018883857 in words is "nineteen billion, eighteen million, eight hundred eighty-three thousand, eight hundred fifty-seven".