19493149742 has 16 divisors (see below), whose sum is σ = 32926846464. Its totient is φ = 8574699000.

The previous prime is 19493149723. The next prime is 19493149763. The reversal of 19493149742 is 24794139491.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 14290484 + ... + 14291847.

It is an arithmetic number, because the mean of its divisors is an integer number (2057927904).

Almost surely, 2^19493149742 is an apocalyptic number.

19493149742 is a deficient number, since it is larger than the sum of its proper divisors (13433696722).

19493149742 is a wasteful number, since it uses less digits than its factorization.

19493149742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28582375.

The product of its digits is 1959552, while the sum is 53.

The spelling of 19493149742 in words is "nineteen billion, four hundred ninety-three million, one hundred forty-nine thousand, seven hundred forty-two".