18393434 has 8 divisors (see below), whose sum is σ = 27612768. Its totient is φ = 9189180.

The previous prime is 18393421. The next prime is 18393437. The reversal of 18393434 is 43439381.

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 = 18393394 and 18393403.

It is not an unprimeable number, because it can be changed into a prime (18393437) 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, 59 + ... + 6065.

It is an arithmetic number, because the mean of its divisors is an integer number (3451596).

Almost surely, 2^18393434 is an apocalyptic number.

18393434 is a deficient number, since it is larger than the sum of its proper divisors (9219334).

18393434 is a wasteful number, since it uses less digits than its factorization.

18393434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7540.

The product of its digits is 31104, while the sum is 35.

The square root of 18393434 is about 4288.7566962932. The cubic root of 18393434 is about 263.9698178688.

The spelling of 18393434 in words is "eighteen million, three hundred ninety-three thousand, four hundred thirty-four".