18106624 has 18 divisors (see below), whose sum is σ = 36143030. Its totient is φ = 9053184.

The previous prime is 18106619. The next prime is 18106637. The reversal of 18106624 is 42660181.

It can be written as a sum of positive squares in only one way, i.e., 16257024 + 1849600 = 4032^2 + 1360^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18106592 and 18106601.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35109 + ... + 35620.

Almost surely, 2^18106624 is an apocalyptic number.

It is an amenable number.

18106624 is a deficient number, since it is larger than the sum of its proper divisors (18036406).

18106624 is an frugal number, since it uses more digits than its factorization.

18106624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70745 (or 70731 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 18106624 is about 4255.1878924438. The cubic root of 18106624 is about 262.5905912571.

The spelling of 18106624 in words is "eighteen million, one hundred six thousand, six hundred twenty-four".