18461224 has 32 divisors (see below), whose sum is σ = 36334080. Its totient is φ = 8783424.

The previous prime is 18461171. The next prime is 18461227. The reversal of 18461224 is 42216481.

It is a junction number, because it is equal to n+sod(n) for n = 18461192 and 18461201.

It is not an unprimeable number, because it can be changed into a prime (18461227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13249 + ... + 14575.

It is an arithmetic number, because the mean of its divisors is an integer number (1135440).

Almost surely, 2^18461224 is an apocalyptic number.

It is an amenable number.

18461224 is a deficient number, since it is larger than the sum of its proper divisors (17872856).

18461224 is a wasteful number, since it uses less digits than its factorization.

18461224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417 (or 1413 counting only the distinct ones).

The product of its digits is 3072, while the sum is 28.

The square root of 18461224 is about 4296.6526506107. The cubic root of 18461224 is about 264.2937119845.

The spelling of 18461224 in words is "eighteen million, four hundred sixty-one thousand, two hundred twenty-four".