18022829 has 6 divisors (see below), whose sum is σ = 19810350. Its totient is φ = 16384280.

The previous prime is 18022819. The next prime is 18022843. The reversal of 18022829 is 92822081.

It can be written as a sum of positive squares in only one way, i.e., 17656804 + 366025 = 4202^2 + 605^2 .

It is not a de Polignac number, because 18022829 - 2²⁴ = 1245613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18022795 and 18022804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18022819) 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, 74354 + ... + 74595.

It is an arithmetic number, because the mean of its divisors is an integer number (3301725).

Almost surely, 2^18022829 is an apocalyptic number.

It is an amenable number.

18022829 is a deficient number, since it is larger than the sum of its proper divisors (1787521).

18022829 is a wasteful number, since it uses less digits than its factorization.

18022829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148971 (or 148960 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 18022829 is about 4245.3302580600. The cubic root of 18022829 is about 262.1848868836.

The spelling of 18022829 in words is "eighteen million, twenty-two thousand, eight hundred twenty-nine".