19413812871 has 24 divisors (see below), whose sum is σ = 28824331536. Its totient is φ = 12583704960.

The previous prime is 19413812849. The next prime is 19413812917. The reversal of 19413812871 is 17821831491.

It is a happy number.

19413812871 is a `hidden beast` number, since 194 + 1 + 381 + 2 + 87 + 1 = 666.

It is not a de Polignac number, because 19413812871 - 2⁵ = 19413812839 is a prime.

It is a super-2 number, since 2×19413812871² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19413816871) 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, 18336 + ... + 197898.

It is an arithmetic number, because the mean of its divisors is an integer number (1201013814).

Almost surely, 2^19413812871 is an apocalyptic number.

19413812871 is a deficient number, since it is larger than the sum of its proper divisors (9410518665).

19413812871 is a wasteful number, since it uses less digits than its factorization.

19413812871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179903 (or 179900 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The spelling of 19413812871 in words is "nineteen billion, four hundred thirteen million, eight hundred twelve thousand, eight hundred seventy-one".