19813313472 has 56 divisors (see below), whose sum is σ = 52446326400. Its totient is φ = 6601464576.

The previous prime is 19813313447. The next prime is 19813313477. The reversal of 19813313472 is 27431331891.

It is a super-3 number, since 3×19813313472³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19813313477) 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, 427029 + ... + 471147.

Almost surely, 2^19813313472 is an apocalyptic number.

19813313472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19813313472 is an abundant number, since it is smaller than the sum of its proper divisors (32633012928).

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

19813313472 is a wasteful number, since it uses less digits than its factorization.

19813313472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46473 (or 46463 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The spelling of 19813313472 in words is "nineteen billion, eight hundred thirteen million, three hundred thirteen thousand, four hundred seventy-two".