20289266 has 24 divisors (see below), whose sum is σ = 32277504. Its totient is φ = 9563400.

The previous prime is 20289193. The next prime is 20289277. The reversal of 20289266 is 66298202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134291 + ... + 134441.

It is an arithmetic number, because the mean of its divisors is an integer number (1344896).

Almost surely, 2^20289266 is an apocalyptic number.

20289266 is a deficient number, since it is larger than the sum of its proper divisors (11988238).

20289266 is a wasteful number, since it uses less digits than its factorization.

20289266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 20289266 is about 4504.3607759592. The cubic root of 20289266 is about 272.7441506255.

The spelling of 20289266 in words is "twenty million, two hundred eighty-nine thousand, two hundred sixty-six".