19136699402 has 4 divisors (see below), whose sum is σ = 28705049106. Its totient is φ = 9568349700.

The previous prime is 19136699377. The next prime is 19136699467. The reversal of 19136699402 is 20499663191.

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., 12387912601 + 6748786801 = 111301^2 + 82151^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4784174849 + ... + 4784174852.

Almost surely, 2^19136699402 is an apocalyptic number.

19136699402 is a deficient number, since it is larger than the sum of its proper divisors (9568349704).

19136699402 is an equidigital number, since it uses as much as digits as its factorization.

19136699402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9568349703.

The product of its (nonzero) digits is 629856, while the sum is 50.

The spelling of 19136699402 in words is "nineteen billion, one hundred thirty-six million, six hundred ninety-nine thousand, four hundred two".