20229764 has 12 divisors (see below), whose sum is σ = 35628684. Its totient is φ = 10050144.

The previous prime is 20229761. The next prime is 20229793. The reversal of 20229764 is 46792202.

It can be written as a sum of positive squares in 2 ways, for example, as 13249600 + 6980164 = 3640^2 + 2642^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20229764.

It is not an unprimeable number, because it can be changed into a prime (20229761) by changing a digit.

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, 15479 + ... + 16734.

It is an arithmetic number, because the mean of its divisors is an integer number (2969057).

Almost surely, 2^20229764 is an apocalyptic number.

It is an amenable number.

20229764 is a deficient number, since it is larger than the sum of its proper divisors (15398920).

20229764 is a wasteful number, since it uses less digits than its factorization.

20229764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32374 (or 32372 counting only the distinct ones).

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

The square root of 20229764 is about 4497.7509935522. The cubic root of 20229764 is about 272.4772654489.

The spelling of 20229764 in words is "twenty million, two hundred twenty-nine thousand, seven hundred sixty-four".