19754138218 has 16 divisors (see below), whose sum is σ = 30141783360. Its totient is φ = 9706970016.

The previous prime is 19754138203. The next prime is 19754138219. The reversal of 19754138218 is 81283145791.

It is not an unprimeable number, because it can be changed into a prime (19754138219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444046 + ... + 486502.

It is an arithmetic number, because the mean of its divisors is an integer number (1883861460).

Almost surely, 2^19754138218 is an apocalyptic number.

19754138218 is a deficient number, since it is larger than the sum of its proper divisors (10387645142).

19754138218 is a wasteful number, since it uses less digits than its factorization.

19754138218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46461.

The product of its digits is 483840, while the sum is 49.

The spelling of 19754138218 in words is "nineteen billion, seven hundred fifty-four million, one hundred thirty-eight thousand, two hundred eighteen".