19397071212 has 24 divisors (see below), whose sum is σ = 45270305136. Its totient is φ = 6464194368.

The previous prime is 19397071207. The next prime is 19397071219. The reversal of 19397071212 is 21217079391.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19397071219) 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, 132343 + ... + 237294.

It is an arithmetic number, because the mean of its divisors is an integer number (1886262714).

Almost surely, 2^19397071212 is an apocalyptic number.

19397071212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19397071212 is an abundant number, since it is smaller than the sum of its proper divisors (25873233924).

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

19397071212 is a wasteful number, since it uses less digits than its factorization.

19397071212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374017 (or 374015 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 42.

The spelling of 19397071212 in words is "nineteen billion, three hundred ninety-seven million, seventy-one thousand, two hundred twelve".