18401332 has 6 divisors (see below), whose sum is σ = 32202338. Its totient is φ = 9200664.

The previous prime is 18401323. The next prime is 18401359. The reversal of 18401332 is 23310481.

It can be written as a sum of positive squares in only one way, i.e., 14699556 + 3701776 = 3834^2 + 1924^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2300163 + ... + 2300170.

Almost surely, 2^18401332 is an apocalyptic number.

It is an amenable number.

18401332 is a deficient number, since it is larger than the sum of its proper divisors (13801006).

18401332 is a wasteful number, since it uses less digits than its factorization.

18401332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4600337 (or 4600335 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 18401332 is about 4289.6773771462. The cubic root of 18401332 is about 264.0075946698.

The spelling of 18401332 in words is "eighteen million, four hundred one thousand, three hundred thirty-two".