18493106 has 4 divisors (see below), whose sum is σ = 27739662. Its totient is φ = 9246552.

The previous prime is 18493073. The next prime is 18493109. The reversal of 18493106 is 60139481.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60139481 = 283 ⋅212507.

It can be written as a sum of positive squares in only one way, i.e., 18139081 + 354025 = 4259^2 + 595^2 .

It is not an unprimeable number, because it can be changed into a prime (18493109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4623275 + ... + 4623278.

Almost surely, 2^18493106 is an apocalyptic number.

18493106 is a deficient number, since it is larger than the sum of its proper divisors (9246556).

18493106 is an equidigital number, since it uses as much as digits as its factorization.

18493106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9246555.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 18493106 is about 4300.3611476247. The cubic root of 18493106 is about 264.4457670191.

The spelling of 18493106 in words is "eighteen million, four hundred ninety-three thousand, one hundred six".