18010778823 has 6 divisors (see below), whose sum is σ = 26015569424. Its totient is φ = 12007185876.

The previous prime is 18010778801. The next prime is 18010778833. The reversal of 18010778823 is 32887701081.

It is not a de Polignac number, because 18010778823 - 2²⁹ = 17473907911 is a prime.

It is a super-2 number, since 2×18010778823² (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 (18010778833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1000598815 + ... + 1000598832.

Almost surely, 2^18010778823 is an apocalyptic number.

18010778823 is a deficient number, since it is larger than the sum of its proper divisors (8004790601).

18010778823 is a wasteful number, since it uses less digits than its factorization.

18010778823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001197653 (or 2001197650 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The spelling of 18010778823 in words is "eighteen billion, ten million, seven hundred seventy-eight thousand, eight hundred twenty-three".