19641674542 has 16 divisors (see below), whose sum is σ = 34242145920. Its totient is φ = 8275184568.

The previous prime is 19641674539. The next prime is 19641674561. The reversal of 19641674542 is 24547614691.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11888808 + ... + 11890459.

It is an arithmetic number, because the mean of its divisors is an integer number (2140134120).

Almost surely, 2^19641674542 is an apocalyptic number.

19641674542 is a deficient number, since it is larger than the sum of its proper divisors (14600471378).

19641674542 is a wasteful number, since it uses less digits than its factorization.

19641674542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23779335.

The product of its digits is 1451520, while the sum is 49.

The spelling of 19641674542 in words is "nineteen billion, six hundred forty-one million, six hundred seventy-four thousand, five hundred forty-two".