18534212 has 6 divisors (see below), whose sum is σ = 32434878. Its totient is φ = 9267104.

The previous prime is 18534181. The next prime is 18534227. The reversal of 18534212 is 21243581.

It can be written as a sum of positive squares in only one way, i.e., 15555136 + 2979076 = 3944^2 + 1726^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2316773 + ... + 2316780.

It is an arithmetic number, because the mean of its divisors is an integer number (5405813).

Almost surely, 2^18534212 is an apocalyptic number.

It is an amenable number.

18534212 is a deficient number, since it is larger than the sum of its proper divisors (13900666).

18534212 is a wasteful number, since it uses less digits than its factorization.

18534212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4633557 (or 4633555 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 18534212 is about 4305.1378607427. The cubic root of 18534212 is about 264.6415564402.

Adding to 18534212 its reverse (21243581), we get a palindrome (39777793).

The spelling of 18534212 in words is "eighteen million, five hundred thirty-four thousand, two hundred twelve".