18429969 has 16 divisors (see below), whose sum is σ = 26191872. Its totient is φ = 11500368.

The previous prime is 18429907. The next prime is 18429973. The reversal of 18429969 is 96992481.

It is not a de Polignac number, because 18429969 - 2⁸ = 18429713 is a prime.

It is a super-2 number, since 2×18429969² = 679327514681922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18429979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402 + ... + 6084.

It is an arithmetic number, because the mean of its divisors is an integer number (1636992).

Almost surely, 2^18429969 is an apocalyptic number.

It is an amenable number.

18429969 is a deficient number, since it is larger than the sum of its proper divisors (7761903).

18429969 is a wasteful number, since it uses less digits than its factorization.

18429969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5756.

The product of its digits is 279936, while the sum is 48.

The square root of 18429969 is about 4293.0139762176. The cubic root of 18429969 is about 264.1444772776.

It can be divided in two parts, 1842 and 9969, that added together give a palindrome (11811).

The spelling of 18429969 in words is "eighteen million, four hundred twenty-nine thousand, nine hundred sixty-nine".