18970224 has 160 divisors (see below), whose sum is σ = 62329344. Its totient is φ = 4838400.

The previous prime is 18970223. The next prime is 18970229. The reversal of 18970224 is 42207981.

It is a happy number.

It is a super-2 number, since 2×18970224² = 719738797220352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18970223) 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 31 ways as a sum of consecutive naturals, for example, 187774 + ... + 187874.

Almost surely, 2^18970224 is an apocalyptic number.

18970224 is a gapful number since it is divisible by the number (14) 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 18970224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31164672).

18970224 is an abundant number, since it is smaller than the sum of its proper divisors (43359120).

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

18970224 is a wasteful number, since it uses less digits than its factorization.

18970224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 18970224 is about 4355.4820628720. The cubic root of 18970224 is about 266.7006984345.

The spelling of 18970224 in words is "eighteen million, nine hundred seventy thousand, two hundred twenty-four".