22720736 has 12 divisors (see below), whose sum is σ = 44731512. Its totient is φ = 11360352.

The previous prime is 22720679. The next prime is 22720741. The reversal of 22720736 is 63702722.

It is a junction number, because it is equal to n+sod(n) for n = 22720699 and 22720708.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 354980 + ... + 355043.

It is an arithmetic number, because the mean of its divisors is an integer number (3727626).

Almost surely, 2^22720736 is an apocalyptic number.

It is an amenable number.

22720736 is a deficient number, since it is larger than the sum of its proper divisors (22010776).

22720736 is an equidigital number, since it uses as much as digits as its factorization.

22720736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710033 (or 710025 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 22720736 is about 4766.6273191849. The cubic root of 22720736 is about 283.2310083404.

The spelling of 22720736 in words is "twenty-two million, seven hundred twenty thousand, seven hundred thirty-six".