18345212 has 6 divisors (see below), whose sum is σ = 32104128. Its totient is φ = 9172604.

The previous prime is 18345209. The next prime is 18345263. The reversal of 18345212 is 21254381.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2293148 + ... + 2293155.

It is an arithmetic number, because the mean of its divisors is an integer number (5350688).

Almost surely, 2^18345212 is an apocalyptic number.

It is an amenable number.

18345212 is a deficient number, since it is larger than the sum of its proper divisors (13758916).

18345212 is a wasteful number, since it uses less digits than its factorization.

18345212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4586307 (or 4586305 counting only the distinct ones).

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

The square root of 18345212 is about 4283.1310976901. The cubic root of 18345212 is about 263.7389330726.

Adding to 18345212 its reverse (21254381), we get a palindrome (39599593).

The spelling of 18345212 in words is "eighteen million, three hundred forty-five thousand, two hundred twelve".