19494185492 has 6 divisors (see below), whose sum is σ = 34114824618. Its totient is φ = 9747092744.

The previous prime is 19494185489. The next prime is 19494185507. The reversal of 19494185492 is 29458149491.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17288568196 + 2205617296 = 131486^2 + 46964^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2436773183 + ... + 2436773190.

It is an arithmetic number, because the mean of its divisors is an integer number (5685804103).

Almost surely, 2^19494185492 is an apocalyptic number.

It is an amenable number.

19494185492 is a deficient number, since it is larger than the sum of its proper divisors (14620639126).

19494185492 is a wasteful number, since it uses less digits than its factorization.

19494185492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4873546377 (or 4873546375 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 56.

The spelling of 19494185492 in words is "nineteen billion, four hundred ninety-four million, one hundred eighty-five thousand, four hundred ninety-two".