19657840376742 has 32 divisors (see below), whose sum is σ = 39424631299200. Its totient is φ = 6534467035008.

The previous prime is 19657840376683. The next prime is 19657840376791. The reversal of 19657840376742 is 24767304875691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5060493 + ... + 8057559.

It is an arithmetic number, because the mean of its divisors is an integer number (1232019728100).

It is a 1-persistent number, because it is pandigital, but 2⋅19657840376742 = 39315680753484 is not.

Almost surely, 2^{19657840376742} is an apocalyptic number.

19657840376742 is an abundant number, since it is smaller than the sum of its proper divisors (19766790922458).

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

19657840376742 is a wasteful number, since it uses less digits than its factorization.

19657840376742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3000100.

The product of its (nonzero) digits is 426746880, while the sum is 69.

The spelling of 19657840376742 in words is "nineteen trillion, six hundred fifty-seven billion, eight hundred forty million, three hundred seventy-six thousand, seven hundred forty-two".