18429705 has 48 divisors (see below), whose sum is σ = 37425024. Its totient is φ = 8213760.

The previous prime is 18429689. The next prime is 18429707. The reversal of 18429705 is 50792481.

It is not a de Polignac number, because 18429705 - 2⁴ = 18429689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18429705.

It is not an unprimeable number, because it can be changed into a prime (18429707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12202 + ... + 13628.

It is an arithmetic number, because the mean of its divisors is an integer number (779688).

Almost surely, 2^18429705 is an apocalyptic number.

18429705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18429705 is an abundant number, since it is smaller than the sum of its proper divisors (18995319).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18429705 is a wasteful number, since it uses less digits than its factorization.

18429705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486 (or 1483 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 18429705 is about 4292.9832284788. The cubic root of 18429705 is about 264.1432160262.

The spelling of 18429705 in words is "eighteen million, four hundred twenty-nine thousand, seven hundred five".