19008402694 has 16 divisors (see below), whose sum is σ = 28923815232. Its totient is φ = 9367316928.

The previous prime is 19008402643. The next prime is 19008402733. The reversal of 19008402694 is 49620480091.

It is a super-2 number, since 2×19008402694² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19008402694.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162012 + ... + 253504.

It is an arithmetic number, because the mean of its divisors is an integer number (1807738452).

Almost surely, 2^19008402694 is an apocalyptic number.

19008402694 is a deficient number, since it is larger than the sum of its proper divisors (9915412538).

19008402694 is a wasteful number, since it uses less digits than its factorization.

19008402694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92991.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 19008402694 in words is "nineteen billion, eight million, four hundred two thousand, six hundred ninety-four".