20768224 has 12 divisors (see below), whose sum is σ = 40887504. Its totient is φ = 10384096.

The previous prime is 20768207. The next prime is 20768249. The reversal of 20768224 is 42286702.

It is a super-2 number, since 2×20768224² = 862638256228352, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 324472 + ... + 324535.

It is an arithmetic number, because the mean of its divisors is an integer number (3407292).

Almost surely, 2^20768224 is an apocalyptic number.

It is an amenable number.

20768224 is a deficient number, since it is larger than the sum of its proper divisors (20119280).

20768224 is an equidigital number, since it uses as much as digits as its factorization.

20768224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649017 (or 649009 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 20768224 is about 4557.2166944309. The cubic root of 20768224 is about 274.8736565634.

The spelling of 20768224 in words is "twenty million, seven hundred sixty-eight thousand, two hundred twenty-four".