19138612894 has 8 divisors (see below), whose sum is σ = 28729989288. Its totient is φ = 9561949800.

The previous prime is 19138612849. The next prime is 19138612907. The reversal of 19138612894 is 49821683191.

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

It is a congruent number.

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, 3675072 + ... + 3680275.

It is an arithmetic number, because the mean of its divisors is an integer number (3591248661).

Almost surely, 2^19138612894 is an apocalyptic number.

19138612894 is a deficient number, since it is larger than the sum of its proper divisors (9591376394).

19138612894 is a wasteful number, since it uses less digits than its factorization.

19138612894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7356650.

The product of its digits is 746496, while the sum is 52.

The spelling of 19138612894 in words is "nineteen billion, one hundred thirty-eight million, six hundred twelve thousand, eight hundred ninety-four".