20767268 has 12 divisors (see below), whose sum is σ = 38480652. Its totient is φ = 9772800.

The previous prime is 20767223. The next prime is 20767273. The reversal of 20767268 is 86276702.

It can be written as a sum of positive squares in 2 ways, for example, as 6190144 + 14577124 = 2488^2 + 3818^2 .

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, 152633 + ... + 152768.

It is an arithmetic number, because the mean of its divisors is an integer number (3206721).

Almost surely, 2^20767268 is an apocalyptic number.

It is an amenable number.

20767268 is a deficient number, since it is larger than the sum of its proper divisors (17713384).

20767268 is a wasteful number, since it uses less digits than its factorization.

20767268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305422 (or 305420 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 20767268 is about 4557.1118046412. Note that the first 3 decimals coincide. The cubic root of 20767268 is about 274.8694388500.

The spelling of 20767268 in words is "twenty million, seven hundred sixty-seven thousand, two hundred sixty-eight".