19147796218 has 16 divisors (see below), whose sum is σ = 30490629120. Its totient is φ = 8987194816.

The previous prime is 19147796209. The next prime is 19147796249. The reversal of 19147796218 is 81269774191.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 722188 + ... + 748231.

It is an arithmetic number, because the mean of its divisors is an integer number (1905664320).

Almost surely, 2^19147796218 is an apocalyptic number.

19147796218 is a deficient number, since it is larger than the sum of its proper divisors (11342832902).

19147796218 is a wasteful number, since it uses less digits than its factorization.

19147796218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470821.

The product of its digits is 1524096, while the sum is 55.

The spelling of 19147796218 in words is "nineteen billion, one hundred forty-seven million, seven hundred ninety-six thousand, two hundred eighteen".