19517287142 has 4 divisors (see below), whose sum is σ = 29275930716. Its totient is φ = 9758643570.

The previous prime is 19517287133. The next prime is 19517287177. The reversal of 19517287142 is 24178271591.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4879321784 + ... + 4879321787.

It is an arithmetic number, because the mean of its divisors is an integer number (7318982679).

Almost surely, 2^19517287142 is an apocalyptic number.

19517287142 is a deficient number, since it is larger than the sum of its proper divisors (9758643574).

19517287142 is an equidigital number, since it uses as much as digits as its factorization.

19517287142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9758643573.

The product of its digits is 282240, while the sum is 47.

The spelling of 19517287142 in words is "nineteen billion, five hundred seventeen million, two hundred eighty-seven thousand, one hundred forty-two".