19138890814 has 8 divisors (see below), whose sum is σ = 28711875888. Its totient is φ = 9568265520.

The previous prime is 19138890809. The next prime is 19138890833. The reversal of 19138890814 is 41809883191.

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, 569527 + ... + 602194.

It is an arithmetic number, because the mean of its divisors is an integer number (3588984486).

Almost surely, 2^19138890814 is an apocalyptic number.

19138890814 is a deficient number, since it is larger than the sum of its proper divisors (9572985074).

19138890814 is a wasteful number, since it uses less digits than its factorization.

19138890814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179890.

The product of its (nonzero) digits is 497664, while the sum is 52.

The spelling of 19138890814 in words is "nineteen billion, one hundred thirty-eight million, eight hundred ninety thousand, eight hundred fourteen".