17819406872 has 32 divisors (see below), whose sum is σ = 34508177280. Its totient is φ = 8621832960.

The previous prime is 17819406859. The next prime is 17819406889. The reversal of 17819406872 is 27860491871.

It is a happy number.

It is a super-2 number, since 2×17819406872² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256904 + ... + 318807.

It is an arithmetic number, because the mean of its divisors is an integer number (1078380540).

Almost surely, 2^17819406872 is an apocalyptic number.

It is an amenable number.

17819406872 is a deficient number, since it is larger than the sum of its proper divisors (16688770408).

17819406872 is a wasteful number, since it uses less digits than its factorization.

17819406872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575843 (or 575839 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 53.

The spelling of 17819406872 in words is "seventeen billion, eight hundred nineteen million, four hundred six thousand, eight hundred seventy-two".