18842531897 has 8 divisors (see below), whose sum is σ = 21591144000. Its totient is φ = 16108125264.

The previous prime is 18842531863. The next prime is 18842531921. The reversal of 18842531897 is 79813524881.

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

It is not a de Polignac number, because 18842531897 - 2¹² = 18842527801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18842531297) 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, 3548522 + ... + 3553827.

It is an arithmetic number, because the mean of its divisors is an integer number (2698893000).

Almost surely, 2^18842531897 is an apocalyptic number.

It is an amenable number.

18842531897 is a deficient number, since it is larger than the sum of its proper divisors (2748612103).

18842531897 is an equidigital number, since it uses as much as digits as its factorization.

18842531897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7102735.

The product of its digits is 3870720, while the sum is 56.

The spelling of 18842531897 in words is "eighteen billion, eight hundred forty-two million, five hundred thirty-one thousand, eight hundred ninety-seven".