19442730985 has 8 divisors (see below), whose sum is σ = 23352171336. Its totient is φ = 15540255360.

The previous prime is 19442730977. The next prime is 19442730997. The reversal of 19442730985 is 58903724491.

It can be written as a sum of positive squares in 4 ways, for example, as 866949136 + 18575781849 = 29444^2 + 136293^2 .

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

It is not a de Polignac number, because 19442730985 - 2³ = 19442730977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1735036 + ... + 1746205.

It is an arithmetic number, because the mean of its divisors is an integer number (2919021417).

Almost surely, 2^19442730985 is an apocalyptic number.

It is an amenable number.

19442730985 is a deficient number, since it is larger than the sum of its proper divisors (3909440351).

19442730985 is a wasteful number, since it uses less digits than its factorization.

19442730985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3482363.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 19442730985 in words is "nineteen billion, four hundred forty-two million, seven hundred thirty thousand, nine hundred eighty-five".