20105264 has 10 divisors (see below), whose sum is σ = 38953980. Its totient is φ = 10052624.

The previous prime is 20105257. The next prime is 20105273. The reversal of 20105264 is 46250102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628274 + ... + 628305.

It is an arithmetic number, because the mean of its divisors is an integer number (3895398).

Almost surely, 2^20105264 is an apocalyptic number.

It is an amenable number.

20105264 is a deficient number, since it is larger than the sum of its proper divisors (18848716).

20105264 is a wasteful number, since it uses less digits than its factorization.

20105264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256587 (or 1256581 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20105264 is about 4483.8893831137. The cubic root of 20105264 is about 271.9171460447.

Adding to 20105264 its reverse (46250102), we get a palindrome (66355366).

The spelling of 20105264 in words is "twenty million, one hundred five thousand, two hundred sixty-four".