20197324 has 12 divisors (see below), whose sum is σ = 40394704. Its totient is φ = 8655984.

The previous prime is 20197321. The next prime is 20197339. The reversal of 20197324 is 42379102.

20197324 is an admirable number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 721333 = 20197324 / (2 + 0 + 1 + 9 + 7 + 3 + 2 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 20197292 and 20197301.

It is not an unprimeable number, because it can be changed into a prime (20197321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360639 + ... + 360694.

Almost surely, 2^20197324 is an apocalyptic number.

It is an amenable number.

20197324 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20197324 is a wasteful number, since it uses less digits than its factorization.

20197324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721344 (or 721342 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 20197324 is about 4494.1432998960. The cubic root of 20197324 is about 272.3315413653.

The spelling of 20197324 in words is "twenty million, one hundred ninety-seven thousand, three hundred twenty-four".