20897324 has 18 divisors (see below), whose sum is σ = 42541380. Its totient is φ = 8955912.

The previous prime is 20897311. The next prime is 20897353. The reversal of 20897324 is 42379802.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53114 + ... + 53505.

It is an arithmetic number, because the mean of its divisors is an integer number (2363410).

Almost surely, 2^20897324 is an apocalyptic number.

It is an amenable number.

20897324 is an abundant number, since it is smaller than the sum of its proper divisors (21644056).

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

20897324 is a wasteful number, since it uses less digits than its factorization.

20897324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106637 (or 106628 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 20897324 is about 4571.3590976864. The cubic root of 20897324 is about 275.4420394910.

The spelling of 20897324 in words is "twenty million, eight hundred ninety-seven thousand, three hundred twenty-four".