18106916 has 6 divisors (see below), whose sum is σ = 31687110. Its totient is φ = 9053456.

The previous prime is 18106909. The next prime is 18106939. The reversal of 18106916 is 61960181.

It can be written as a sum of positive squares in only one way, i.e., 18028516 + 78400 = 4246^2 + 280^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2263361 + ... + 2263368.

It is an arithmetic number, because the mean of its divisors is an integer number (5281185).

Almost surely, 2^18106916 is an apocalyptic number.

It is an amenable number.

18106916 is a deficient number, since it is larger than the sum of its proper divisors (13580194).

18106916 is a wasteful number, since it uses less digits than its factorization.

18106916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4526733 (or 4526731 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 18106916 is about 4255.2222033638. Note that the first 4 decimals coincide. The cubic root of 18106916 is about 262.5920028223.

The spelling of 18106916 in words is "eighteen million, one hundred six thousand, nine hundred sixteen".