18472212 has 120 divisors (see below), whose sum is σ = 54153792. Its totient is φ = 5443200.

The previous prime is 18472189. The next prime is 18472247. The reversal of 18472212 is 21227481.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 253008 + ... + 253080.

Almost surely, 2^18472212 is an apocalyptic number.

18472212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18472212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27076896).

18472212 is an abundant number, since it is smaller than the sum of its proper divisors (35681580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18472212 is a wasteful number, since it uses less digits than its factorization.

18472212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 160 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 18472212 is about 4297.9311302067. The cubic root of 18472212 is about 264.3461368822.

Adding to 18472212 its reverse (21227481), we get a palindrome (39699693).

The spelling of 18472212 in words is "eighteen million, four hundred seventy-two thousand, two hundred twelve".