18073472 has 16 divisors (see below), whose sum is σ = 36006000. Its totient is φ = 9036672.

The previous prime is 18073463. The next prime is 18073493. The reversal of 18073472 is 27437081.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 70472 + ... + 70727.

It is an arithmetic number, because the mean of its divisors is an integer number (2250375).

Almost surely, 2^18073472 is an apocalyptic number.

It is an amenable number.

18073472 is a deficient number, since it is larger than the sum of its proper divisors (17932528).

18073472 is an equidigital number, since it uses as much as digits as its factorization.

18073472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141213 (or 141201 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 18073472 is about 4251.2906275624. The cubic root of 18073472 is about 262.4302314960.

The spelling of 18073472 in words is "eighteen million, seventy-three thousand, four hundred seventy-two".