18432401 has 8 divisors (see below), whose sum is σ = 20387304. Its totient is φ = 16554240.

The previous prime is 18432389. The next prime is 18432409. The reversal of 18432401 is 10423481.

It can be written as a sum of positive squares in 4 ways, for example, as 4000000 + 14432401 = 2000^2 + 3799^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18432401 - 2¹⁰ = 18431377 is a prime.

It is a cake number, because a cake can be divided into 18432401 parts by 480 planar cuts.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18432409) 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, 18680 + ... + 19641.

It is an arithmetic number, because the mean of its divisors is an integer number (2548413).

Almost surely, 2^18432401 is an apocalyptic number.

It is an amenable number.

18432401 is a deficient number, since it is larger than the sum of its proper divisors (1954903).

18432401 is a wasteful number, since it uses less digits than its factorization.

18432401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38371.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 18432401 is about 4293.2972177570. The cubic root of 18432401 is about 264.1560955123.

Adding to 18432401 its reverse (10423481), we get a palindrome (28855882).

The spelling of 18432401 in words is "eighteen million, four hundred thirty-two thousand, four hundred one".