19107606818 has 4 divisors (see below), whose sum is σ = 28661410230. Its totient is φ = 9553803408.

The previous prime is 19107606811. The next prime is 19107606821. The reversal of 19107606818 is 81860670191.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17706826489 + 1400780329 = 133067^2 + 37427^2 .

It is a super-2 number, since 2×19107606818² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19107606811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4776901703 + ... + 4776901706.

Almost surely, 2^19107606818 is an apocalyptic number.

19107606818 is a deficient number, since it is larger than the sum of its proper divisors (9553803412).

19107606818 is an equidigital number, since it uses as much as digits as its factorization.

19107606818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9553803411.

The product of its (nonzero) digits is 145152, while the sum is 47.

The spelling of 19107606818 in words is "nineteen billion, one hundred seven million, six hundred six thousand, eight hundred eighteen".