19952281185 has 8 divisors (see below), whose sum is σ = 31923649920. Its totient is φ = 10641216624.

The previous prime is 19952281157. The next prime is 19952281211. The reversal of 19952281185 is 58118225991.

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

It is not a de Polignac number, because 19952281185 - 2¹⁵ = 19952248417 is a prime.

It is a Curzon 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, 665076025 + ... + 665076054.

It is an arithmetic number, because the mean of its divisors is an integer number (3990456240).

Almost surely, 2^19952281185 is an apocalyptic number.

19952281185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19952281185 is a deficient number, since it is larger than the sum of its proper divisors (11971368735).

19952281185 is a wasteful number, since it uses less digits than its factorization.

19952281185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330152087.

The product of its digits is 518400, while the sum is 51.

The spelling of 19952281185 in words is "nineteen billion, nine hundred fifty-two million, two hundred eighty-one thousand, one hundred eighty-five".