19896844057 has 8 divisors (see below), whose sum is σ = 20044371200. Its totient is φ = 19749379824.

The previous prime is 19896844027. The next prime is 19896844063. The reversal of 19896844057 is 75044869891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19896844057 - 2⁷ = 19896843929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19896843986 and 19896844004.

It is not an unprimeable number, because it can be changed into a prime (19896844027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 759544 + ... + 785302.

It is an arithmetic number, because the mean of its divisors is an integer number (2505546400).

Almost surely, 2^19896844057 is an apocalyptic number.

It is an amenable number.

19896844057 is a deficient number, since it is larger than the sum of its proper divisors (147527143).

19896844057 is a wasteful number, since it uses less digits than its factorization.

19896844057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31455.

The product of its (nonzero) digits is 17418240, while the sum is 61.

The spelling of 19896844057 in words is "nineteen billion, eight hundred ninety-six million, eight hundred forty-four thousand, fifty-seven".