19649260742 has 16 divisors (see below), whose sum is σ = 31781862000. Its totient is φ = 9080530560.

The previous prime is 19649260711. The next prime is 19649260747. The reversal of 19649260742 is 24706294691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19649260747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6304367 + ... + 6307482.

It is an arithmetic number, because the mean of its divisors is an integer number (1986366375).

Almost surely, 2^19649260742 is an apocalyptic number.

19649260742 is a deficient number, since it is larger than the sum of its proper divisors (12132601258).

19649260742 is a wasteful number, since it uses less digits than its factorization.

19649260742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12611911.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 19649260742 in words is "nineteen billion, six hundred forty-nine million, two hundred sixty thousand, seven hundred forty-two".