19148768212 has 72 divisors (see below), whose sum is σ = 40084264584. Its totient is φ = 7974989568.

The previous prime is 19148768203. The next prime is 19148768263. The reversal of 19148768212 is 21286784191.

It can be written as a sum of positive squares in 4 ways, for example, as 2609779396 + 16538988816 = 51086^2 + 128604^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

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 23 ways as a sum of consecutive naturals, for example, 11696658 + ... + 11698294.

It is an arithmetic number, because the mean of its divisors is an integer number (556725897).

Almost surely, 2^19148768212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19148768212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20042132292).

19148768212 is an abundant number, since it is smaller than the sum of its proper divisors (20935496372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19148768212 is a wasteful number, since it uses less digits than its factorization.

19148768212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3305 (or 3296 counting only the distinct ones).

The product of its digits is 387072, while the sum is 49.

The spelling of 19148768212 in words is "nineteen billion, one hundred forty-eight million, seven hundred sixty-eight thousand, two hundred twelve".