20669234 has 16 divisors (see below), whose sum is σ = 31838400. Its totient is φ = 10059984.

The previous prime is 20669227. The next prime is 20669239. The reversal of 20669234 is 43296602.

It is a self number, because there is not a number n which added to its sum of digits gives 20669234.

It is not an unprimeable number, because it can be changed into a prime (20669239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12059 + ... + 13665.

It is an arithmetic number, because the mean of its divisors is an integer number (1989900).

Almost surely, 2^20669234 is an apocalyptic number.

20669234 is a deficient number, since it is larger than the sum of its proper divisors (11169166).

20669234 is a wasteful number, since it uses less digits than its factorization.

20669234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 20669234 is about 4546.3429259131. The cubic root of 20669234 is about 274.4362401030.

The spelling of 20669234 in words is "twenty million, six hundred sixty-nine thousand, two hundred thirty-four".