20269768 has 8 divisors (see below), whose sum is σ = 38005830. Its totient is φ = 10134880.

The previous prime is 20269721. The next prime is 20269771. The reversal of 20269768 is 86796202.

It can be written as a sum of positive squares in only one way, i.e., 20268004 + 1764 = 4502^2 + 42^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 20269768.

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, 1266853 + ... + 1266868.

Almost surely, 2^20269768 is an apocalyptic number.

It is an amenable number.

20269768 is a deficient number, since it is larger than the sum of its proper divisors (17736062).

20269768 is a wasteful number, since it uses less digits than its factorization.

20269768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2533727 (or 2533723 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 20269768 is about 4502.1959086650. The cubic root of 20269768 is about 272.6567535115.

The spelling of 20269768 in words is "twenty million, two hundred sixty-nine thousand, seven hundred sixty-eight".