19517072842 has 8 divisors (see below), whose sum is σ = 29276356032. Its totient is φ = 9758287500.

The previous prime is 19517072833. The next prime is 19517072851. The reversal of 19517072842 is 24827071591.

It is an interprime number because it is at equal distance from previous prime (19517072833) and next prime (19517072851).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×19517072842² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19517072792 and 19517072801.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2584 + ... + 197587.

It is an arithmetic number, because the mean of its divisors is an integer number (3659544504).

Almost surely, 2^19517072842 is an apocalyptic number.

19517072842 is a deficient number, since it is larger than the sum of its proper divisors (9759283190).

19517072842 is a wasteful number, since it uses less digits than its factorization.

19517072842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248924.

The product of its (nonzero) digits is 282240, while the sum is 46.

The spelling of 19517072842 in words is "nineteen billion, five hundred seventeen million, seventy-two thousand, eight hundred forty-two".