18429423 has 4 divisors (see below), whose sum is σ = 24572568. Its totient is φ = 12286280.

The previous prime is 18429421. The next prime is 18429427. The reversal of 18429423 is 32492481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18429423 - 2¹ = 18429421 is a prime.

It is a super-2 number, since 2×18429423² = 679287264225858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18429421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3071568 + ... + 3071573.

It is an arithmetic number, because the mean of its divisors is an integer number (6143142).

Almost surely, 2^18429423 is an apocalyptic number.

18429423 is a deficient number, since it is larger than the sum of its proper divisors (6143145).

18429423 is an equidigital number, since it uses as much as digits as its factorization.

18429423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6143144.

The product of its digits is 13824, while the sum is 33.

The square root of 18429423 is about 4292.9503840599. The cubic root of 18429423 is about 264.1418687670.

The spelling of 18429423 in words is "eighteen million, four hundred twenty-nine thousand, four hundred twenty-three".