20653329 has 8 divisors (see below), whose sum is σ = 27748512. Its totient is φ = 13663520.

The previous prime is 20653309. The next prime is 20653331. The reversal of 20653329 is 92335602.

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

It is a cyclic number.

It is not a de Polignac number, because 20653329 - 2¹³ = 20645137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20653296 and 20653305.

It is not an unprimeable number, because it can be changed into a prime (20653309) 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, 25884 + ... + 26669.

It is an arithmetic number, because the mean of its divisors is an integer number (3468564).

Almost surely, 2^20653329 is an apocalyptic number.

It is an amenable number.

20653329 is a deficient number, since it is larger than the sum of its proper divisors (7095183).

20653329 is a wasteful number, since it uses less digits than its factorization.

20653329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52687.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 20653329 is about 4544.5933811508. The cubic root of 20653329 is about 274.3658290357.

It can be divided in two parts, 206 and 53329, that added together give a palindrome (53535).

The spelling of 20653329 in words is "twenty million, six hundred fifty-three thousand, three hundred twenty-nine".