19749010867 has 8 divisors (see below), whose sum is σ = 19792771232. Its totient is φ = 19705291200.

The previous prime is 19749010847. The next prime is 19749010871. The reversal of 19749010867 is 76801094791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19749010867 - 2¹⁵ = 19748978099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19749010847) 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, 1089583 + ... + 1107559.

It is an arithmetic number, because the mean of its divisors is an integer number (2474096404).

Almost surely, 2^19749010867 is an apocalyptic number.

19749010867 is a deficient number, since it is larger than the sum of its proper divisors (43760365).

19749010867 is a wasteful number, since it uses less digits than its factorization.

19749010867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20349.

The product of its (nonzero) digits is 762048, while the sum is 52.

The spelling of 19749010867 in words is "nineteen billion, seven hundred forty-nine million, ten thousand, eight hundred sixty-seven".