19855914342 has 32 divisors (see below), whose sum is σ = 43329012480. Its totient is φ = 6015969120.

The previous prime is 19855914317. The next prime is 19855914349. The reversal of 19855914342 is 24341955891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19855914349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 457959 + ... + 499437.

It is an arithmetic number, because the mean of its divisors is an integer number (1354031640).

Almost surely, 2^19855914342 is an apocalyptic number.

19855914342 is an abundant number, since it is smaller than the sum of its proper divisors (23473098138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19855914342 is a wasteful number, since it uses less digits than its factorization.

19855914342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48748.

The product of its digits is 1555200, while the sum is 51.

The spelling of 19855914342 in words is "nineteen billion, eight hundred fifty-five million, nine hundred fourteen thousand, three hundred forty-two".