18429073 has 8 divisors (see below), whose sum is σ = 19880168. Its totient is φ = 16982784.

The previous prime is 18429067. The next prime is 18429079. The reversal of 18429073 is 37092481.

It is an interprime number because it is at equal distance from previous prime (18429067) and next prime (18429079).

It can be written as a sum of positive squares in 4 ways, for example, as 11209104 + 7219969 = 3348^2 + 2687^2 .

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

It is not a de Polignac number, because 18429073 - 2¹³ = 18420881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18429079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13561 + ... + 14857.

It is an arithmetic number, because the mean of its divisors is an integer number (2485021).

Almost surely, 2^18429073 is an apocalyptic number.

18429073 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18429073 is a deficient number, since it is larger than the sum of its proper divisors (1451095).

18429073 is a wasteful number, since it uses less digits than its factorization.

18429073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 18429073 is about 4292.9096193607. The cubic root of 18429073 is about 264.1401966177.

The spelling of 18429073 in words is "eighteen million, four hundred twenty-nine thousand, seventy-three".