20427266 has 16 divisors (see below), whose sum is σ = 32755968. Its totient is φ = 9530400.

The previous prime is 20427257. The next prime is 20427271. The reversal of 20427266 is 66272402.

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 7 ways as a sum of consecutive naturals, for example, 3530 + ... + 7301.

It is an arithmetic number, because the mean of its divisors is an integer number (2047248).

Almost surely, 2^20427266 is an apocalyptic number.

20427266 is a deficient number, since it is larger than the sum of its proper divisors (12328702).

20427266 is a wasteful number, since it uses less digits than its factorization.

20427266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10897.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 20427266 is about 4519.6533052879. The cubic root of 20427266 is about 273.3611218360.

Adding to 20427266 its reverse (66272402), we get a palindrome (86699668).

The spelling of 20427266 in words is "twenty million, four hundred twenty-seven thousand, two hundred sixty-six".