18394029 has 12 divisors (see below), whose sum is σ = 26934076. Its totient is φ = 12094272.

The previous prime is 18393989. The next prime is 18394073. The reversal of 18394029 is 92049381.

It can be written as a sum of positive squares in 2 ways, for example, as 14402025 + 3992004 = 3795^2 + 1998^2 .

It is not a de Polignac number, because 18394029 - 2¹² = 18389933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18393984 and 18394002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18394429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13342 + ... + 14655.

Almost surely, 2^18394029 is an apocalyptic number.

It is an amenable number.

18394029 is a deficient number, since it is larger than the sum of its proper divisors (8540047).

18394029 is a wasteful number, since it uses less digits than its factorization.

18394029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28076 (or 28073 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 18394029 is about 4288.8260631553. The cubic root of 18394029 is about 263.9726641806.

The spelling of 18394029 in words is "eighteen million, three hundred ninety-four thousand, twenty-nine".