19378334642 has 16 divisors (see below), whose sum is σ = 29336573952. Its totient is φ = 9599812800.

The previous prime is 19378334603. The next prime is 19378334659. The reversal of 19378334642 is 24643387391.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31898 + ... + 199434.

It is an arithmetic number, because the mean of its divisors is an integer number (1833535872).

Almost surely, 2^19378334642 is an apocalyptic number.

19378334642 is a deficient number, since it is larger than the sum of its proper divisors (9958239310).

19378334642 is a wasteful number, since it uses less digits than its factorization.

19378334642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168073.

The product of its digits is 2612736, while the sum is 50.

The spelling of 19378334642 in words is "nineteen billion, three hundred seventy-eight million, three hundred thirty-four thousand, six hundred forty-two".