19513019212 has 12 divisors (see below), whose sum is σ = 34148796696. Its totient is φ = 9756220160.

The previous prime is 19513019191. The next prime is 19513019219. The reversal of 19513019212 is 21291031591.

It is a happy number.

It is a super-2 number, since 2×19513019212² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19513019219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168123 + ... + 259405.

It is an arithmetic number, because the mean of its divisors is an integer number (2845733058).

Almost surely, 2^19513019212 is an apocalyptic number.

It is an amenable number.

19513019212 is a deficient number, since it is larger than the sum of its proper divisors (14635777484).

19513019212 is a wasteful number, since it uses less digits than its factorization.

19513019212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144728 (or 144726 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 34.

The spelling of 19513019212 in words is "nineteen billion, five hundred thirteen million, nineteen thousand, two hundred twelve".