18203472 has 60 divisors (see below), whose sum is σ = 58225440. Its totient is φ = 5200704.

The previous prime is 18203459. The next prime is 18203483. The reversal of 18203472 is 27430281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8022 + ... + 10037.

It is an arithmetic number, because the mean of its divisors is an integer number (970424).

Almost surely, 2^18203472 is an apocalyptic number.

18203472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18203472 is an abundant number, since it is smaller than the sum of its proper divisors (40021968).

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

18203472 is a wasteful number, since it uses less digits than its factorization.

18203472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18080 (or 18071 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 18203472 is about 4266.5527068114. The cubic root of 18203472 is about 263.0579370882.

It can be divided in two parts, 182034 and 72, that added together give a triangular number (182106 = T₆₀₃).

The spelling of 18203472 in words is "eighteen million, two hundred three thousand, four hundred seventy-two".