19207974912 has 624 divisors, whose sum is σ = 66335304960. Its totient is φ = 4904976384.

The previous prime is 19207974881. The next prime is 19207974937. The reversal of 19207974912 is 21947970291.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 263122908 + ... + 263122980.

Almost surely, 2^19207974912 is an apocalyptic number.

19207974912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19207974912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33167652480).

19207974912 is an abundant number, since it is smaller than the sum of its proper divisors (47127330048).

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

19207974912 is a wasteful number, since it uses less digits than its factorization.

19207974912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 51.

The spelling of 19207974912 in words is "nineteen billion, two hundred seven million, nine hundred seventy-four thousand, nine hundred twelve".