19849835953 has 8 divisors (see below), whose sum is σ = 21305385288. Its totient is φ = 18426276864.

The previous prime is 19849835939. The next prime is 19849835989. The reversal of 19849835953 is 35953894891.

It can be written as a sum of positive squares in 4 ways, for example, as 7088292864 + 12761543089 = 84192^2 + 112967^2 .

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 19849835953 - 2⁵ = 19849835921 is a prime.

It is a super-2 number, since 2×19849835953² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19849833953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7996276 + ... + 7998757.

It is an arithmetic number, because the mean of its divisors is an integer number (2663173161).

Almost surely, 2^19849835953 is an apocalyptic number.

It is an amenable number.

19849835953 is a deficient number, since it is larger than the sum of its proper divisors (1455549335).

19849835953 is a wasteful number, since it uses less digits than its factorization.

19849835953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15995123.

The product of its digits is 41990400, while the sum is 64.

The spelling of 19849835953 in words is "nineteen billion, eight hundred forty-nine million, eight hundred thirty-five thousand, nine hundred fifty-three".