20697224 has 16 divisors (see below), whose sum is σ = 39171600. Its totient is φ = 10251472.

The previous prime is 20697203. The next prime is 20697241. The reversal of 20697224 is 42279602.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 11234 + ... + 12945.

It is an arithmetic number, because the mean of its divisors is an integer number (2448225).

Almost surely, 2^20697224 is an apocalyptic number.

It is an amenable number.

20697224 is a deficient number, since it is larger than the sum of its proper divisors (18474376).

20697224 is a wasteful number, since it uses less digits than its factorization.

20697224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24292 (or 24288 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 20697224 is about 4549.4201828365. The cubic root of 20697224 is about 274.5600635207.

The spelling of 20697224 in words is "twenty million, six hundred ninety-seven thousand, two hundred twenty-four".