18469129 has 6 divisors (see below), whose sum is σ = 21484554. Its totient is φ = 15830640.

The previous prime is 18469109. The next prime is 18469141. The reversal of 18469129 is 92196481.

It can be written as a sum of positive squares in only one way, i.e., 18292729 + 176400 = 4277^2 + 420^2 .

It is not a de Polignac number, because 18469129 - 2⁵ = 18469097 is a prime.

It is a super-2 number, since 2×18469129² = 682217452037282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18469091 and 18469100.

It is not an unprimeable number, because it can be changed into a prime (18469109) 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, 188412 + ... + 188509.

It is an arithmetic number, because the mean of its divisors is an integer number (3580759).

Almost surely, 2^18469129 is an apocalyptic number.

It is an amenable number.

18469129 is a deficient number, since it is larger than the sum of its proper divisors (3015425).

18469129 is an equidigital number, since it uses as much as digits as its factorization.

18469129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376935 (or 376928 counting only the distinct ones).

The product of its digits is 31104, while the sum is 40.

The square root of 18469129 is about 4297.5724543049. The cubic root of 18469129 is about 264.3314296653.

The spelling of 18469129 in words is "eighteen million, four hundred sixty-nine thousand, one hundred twenty-nine".