19899996471 has 24 divisors (see below), whose sum is σ = 28857329280. Its totient is φ = 13214645136.

The previous prime is 19899996461. The next prime is 19899996517. The reversal of 19899996471 is 17469999891.

It is not a de Polignac number, because 19899996471 - 2¹³ = 19899988279 is a prime.

It is a super-3 number, since 3×19899996471³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19899996471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19899996461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3629310 + ... + 3634788.

It is an arithmetic number, because the mean of its divisors is an integer number (1202388720).

Almost surely, 2^19899996471 is an apocalyptic number.

19899996471 is a deficient number, since it is larger than the sum of its proper divisors (8957332809).

19899996471 is a wasteful number, since it uses less digits than its factorization.

19899996471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6995 (or 6992 counting only the distinct ones).

The product of its digits is 79361856, while the sum is 72.

The spelling of 19899996471 in words is "nineteen billion, eight hundred ninety-nine million, nine hundred ninety-six thousand, four hundred seventy-one".