13947506919 has 12 divisors (see below), whose sum is σ = 20170888816. Its totient is φ = 9287034912.

The previous prime is 13947506917. The next prime is 13947506927. The reversal of 13947506919 is 91960574931.

13947506919 is a `hidden beast` number, since 1 + 3 + 9 + 47 + 506 + 91 + 9 = 666.

It is not a de Polignac number, because 13947506919 - 2¹ = 13947506917 is a prime.

It is a super-2 number, since 2×13947506919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13947506917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 934102 + ... + 948915.

Almost surely, 2^13947506919 is an apocalyptic number.

13947506919 is a deficient number, since it is larger than the sum of its proper divisors (6223381897).

13947506919 is a wasteful number, since it uses less digits than its factorization.

13947506919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883846 (or 1883843 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 54.

The spelling of 13947506919 in words is "thirteen billion, nine hundred forty-seven million, five hundred six thousand, nine hundred nineteen".