19857557702 has 16 divisors (see below), whose sum is σ = 31091172192. Its totient is φ = 9494105280.

The previous prime is 19857557683. The next prime is 19857557711. The reversal of 19857557702 is 20775575891.

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, 83552 + ... + 216092.

It is an arithmetic number, because the mean of its divisors is an integer number (1943198262).

Almost surely, 2^19857557702 is an apocalyptic number.

19857557702 is a deficient number, since it is larger than the sum of its proper divisors (11233614490).

19857557702 is a wasteful number, since it uses less digits than its factorization.

19857557702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135823.

The product of its (nonzero) digits is 6174000, while the sum is 56.

The spelling of 19857557702 in words is "nineteen billion, eight hundred fifty-seven million, five hundred fifty-seven thousand, seven hundred two".