18193434 has 64 divisors (see below), whose sum is σ = 44706816. Its totient is φ = 4817664.

The previous prime is 18193421. The next prime is 18193453. The reversal of 18193434 is 43439181.

It is a junction number, because it is equal to n+sod(n) for n = 18193395 and 18193404.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 59109 + ... + 59415.

It is an arithmetic number, because the mean of its divisors is an integer number (698544).

Almost surely, 2^18193434 is an apocalyptic number.

18193434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18193434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22353408).

18193434 is an abundant number, since it is smaller than the sum of its proper divisors (26513382).

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

18193434 is a wasteful number, since it uses less digits than its factorization.

18193434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419.

The product of its digits is 10368, while the sum is 33.

The square root of 18193434 is about 4265.3761850510. The cubic root of 18193434 is about 263.0095752320.

It can be divided in two parts, 1819 and 3434, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 18193434 in words is "eighteen million, one hundred ninety-three thousand, four hundred thirty-four".