16725418 has 8 divisors (see below), whose sum is σ = 25113348. Its totient is φ = 8354304.

The previous prime is 16725403. The next prime is 16725421. The reversal of 16725418 is 81452761.

It can be written as a sum of positive squares in 2 ways, for example, as 15499969 + 1225449 = 3937^2 + 1107^2 .

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

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1321 + ... + 5932.

Almost surely, 2^16725418 is an apocalyptic number.

16725418 is a deficient number, since it is larger than the sum of its proper divisors (8387930).

16725418 is a wasteful number, since it uses less digits than its factorization.

16725418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8408.

The product of its digits is 13440, while the sum is 34.

The square root of 16725418 is about 4089.6721139964. The cubic root of 16725418 is about 255.7362701482.

It can be divided in two parts, 1672 and 5418, that multiplied together give a triangular number (9058896 = T₄₂₅₆).

The spelling of 16725418 in words is "sixteen million, seven hundred twenty-five thousand, four hundred eighteen".