18143974422819 has 32 divisors (see below), whose sum is σ = 32527012976640. Its totient is φ = 9758103889536.

The previous prime is 18143974422797. The next prime is 18143974422829. The reversal of 18143974422819 is 91822447934181.

18143974422819 is a `hidden beast` number, since 1 + 8 + 1 + 4 + 397 + 4 + 4 + 228 + 19 = 666.

It is not a de Polignac number, because 18143974422819 - 2⁹ = 18143974422307 is a prime.

It is a super-2 number, since 2×18143974422819² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (18143974422829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2823522219 + ... + 2823528644.

It is an arithmetic number, because the mean of its divisors is an integer number (1016469155520).

Almost surely, 2^{18143974422819} is an apocalyptic number.

18143974422819 is a deficient number, since it is larger than the sum of its proper divisors (14383038553821).

18143974422819 is a wasteful number, since it uses less digits than its factorization.

18143974422819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5647050896 (or 5647050890 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The spelling of 18143974422819 in words is "eighteen trillion, one hundred forty-three billion, nine hundred seventy-four million, four hundred twenty-two thousand, eight hundred nineteen".