19017534942 has 240 divisors, whose sum is σ = 53496994320. Its totient is φ = 5015582208.

The previous prime is 19017534937. The next prime is 19017534961. The reversal of 19017534942 is 24943571091.

19017534942 is a `hidden beast` number, since 1 + 90 + 1 + 75 + 3 + 494 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 7150809 + ... + 7153467.

It is an arithmetic number, because the mean of its divisors is an integer number (222904143).

Almost surely, 2^19017534942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19017534942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26748497160).

19017534942 is an abundant number, since it is smaller than the sum of its proper divisors (34479459378).

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

19017534942 is a wasteful number, since it uses less digits than its factorization.

19017534942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2757 (or 2741 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 19017534942 in words is "nineteen billion, seventeen million, five hundred thirty-four thousand, nine hundred forty-two".