18041812819 has 8 divisors (see below), whose sum is σ = 19108921680. Its totient is φ = 16975351296.

The previous prime is 18041812813. The next prime is 18041812847. The reversal of 18041812819 is 91821814081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18041812819 - 2¹⁵ = 18041780051 is a prime.

It is a super-2 number, since 2×18041812819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18041812813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103849 + ... + 216490.

It is an arithmetic number, because the mean of its divisors is an integer number (2388615210).

Almost surely, 2^18041812819 is an apocalyptic number.

18041812819 is a deficient number, since it is larger than the sum of its proper divisors (1067108861).

18041812819 is a wasteful number, since it uses less digits than its factorization.

18041812819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323669.

The product of its (nonzero) digits is 36864, while the sum is 43.

The spelling of 18041812819 in words is "eighteen billion, forty-one million, eight hundred twelve thousand, eight hundred nineteen".