19857153234995 has 8 divisors (see below), whose sum is σ = 23828607805680. Its totient is φ = 15885706638880.

The previous prime is 19857153234979. The next prime is 19857153235037. The reversal of 19857153234995 is 59943235175891.

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

It is not a de Polignac number, because 19857153234995 - 2⁴ = 19857153234979 is a prime.

It is an unprimeable number.

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, 8661725 + ... + 10711665.

It is an arithmetic number, because the mean of its divisors is an integer number (2978575975710).

Almost surely, 2^{19857153234995} is an apocalyptic number.

19857153234995 is a deficient number, since it is larger than the sum of its proper divisors (3971454570685).

19857153234995 is a wasteful number, since it uses less digits than its factorization.

19857153234995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3987285.

The product of its digits is 367416000, while the sum is 71.

The spelling of 19857153234995 in words is "nineteen trillion, eight hundred fifty-seven billion, one hundred fifty-three million, two hundred thirty-four thousand, nine hundred ninety-five".