18425434 has 8 divisors (see below), whose sum is σ = 27658368. Its totient is φ = 9205980.

The previous prime is 18425431. The next prime is 18425437. The reversal of 18425434 is 43452481.

It is an interprime number because it is at equal distance from previous prime (18425431) and next prime (18425437).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 18425396 and 18425405.

It is not an unprimeable number, because it can be changed into a prime (18425431) 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 3 ways as a sum of consecutive naturals, for example, 1399 + ... + 6229.

It is an arithmetic number, because the mean of its divisors is an integer number (3457296).

Almost surely, 2^18425434 is an apocalyptic number.

18425434 is a deficient number, since it is larger than the sum of its proper divisors (9232934).

18425434 is a wasteful number, since it uses less digits than its factorization.

18425434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6740.

The product of its digits is 15360, while the sum is 31.

The square root of 18425434 is about 4292.4857600230. The cubic root of 18425434 is about 264.1228097883.

The spelling of 18425434 in words is "eighteen million, four hundred twenty-five thousand, four hundred thirty-four".