19048692857 has 4 divisors (see below), whose sum is σ = 19153934436. Its totient is φ = 18943451280.

The previous prime is 19048692841. The next prime is 19048692863. The reversal of 19048692857 is 75829684091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75829684091 = 7 ⋅10832812013.

It can be written as a sum of positive squares in 2 ways, for example, as 7133660521 + 11915032336 = 84461^2 + 109156^2 .

It is a cyclic number.

It is not a de Polignac number, because 19048692857 - 2⁴ = 19048692841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19048692796 and 19048692805.

It is not an unprimeable number, because it can be changed into a prime (19048692827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52620518 + ... + 52620879.

It is an arithmetic number, because the mean of its divisors is an integer number (4788483609).

Almost surely, 2^19048692857 is an apocalyptic number.

It is an amenable number.

19048692857 is a deficient number, since it is larger than the sum of its proper divisors (105241579).

19048692857 is a wasteful number, since it uses less digits than its factorization.

19048692857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105241578.

The product of its (nonzero) digits is 8709120, while the sum is 59.

The spelling of 19048692857 in words is "nineteen billion, forty-eight million, six hundred ninety-two thousand, eight hundred fifty-seven".