18196572 has 24 divisors (see below), whose sum is σ = 43923600. Its totient is φ = 5856256.

The previous prime is 18196571. The next prime is 18196583. The reversal of 18196572 is 27569181.

It is a super-2 number, since 2×18196572² = 662230465102368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18196572.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18196571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25797 + ... + 26492.

It is an arithmetic number, because the mean of its divisors is an integer number (1830150).

Almost surely, 2^18196572 is an apocalyptic number.

18196572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18196572 is an abundant number, since it is smaller than the sum of its proper divisors (25727028).

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

18196572 is a wasteful number, since it uses less digits than its factorization.

18196572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52325 (or 52323 counting only the distinct ones).

The product of its digits is 30240, while the sum is 39.

The square root of 18196572 is about 4265.7440148232. The cubic root of 18196572 is about 263.0246956430.

The spelling of 18196572 in words is "eighteen million, one hundred ninety-six thousand, five hundred seventy-two".