20653105 has 8 divisors (see below), whose sum is σ = 27036864. Its totient is φ = 15020400.

The previous prime is 20653097. The next prime is 20653109. The reversal of 20653105 is 50135602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20653105 - 2³ = 20653097 is a prime.

It is a super-2 number, since 2×20653105² = 853101492282050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20653109) by changing a digit.

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, 187701 + ... + 187810.

It is an arithmetic number, because the mean of its divisors is an integer number (3379608).

Almost surely, 2^20653105 is an apocalyptic number.

It is an amenable number.

20653105 is a deficient number, since it is larger than the sum of its proper divisors (6383759).

20653105 is a wasteful number, since it uses less digits than its factorization.

20653105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375527.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 20653105 is about 4544.5687364149. The cubic root of 20653105 is about 274.3648371348.

Adding to 20653105 its reverse (50135602), we get a palindrome (70788707).

The spelling of 20653105 in words is "twenty million, six hundred fifty-three thousand, one hundred five".