20632261 has 8 divisors (see below), whose sum is σ = 22266720. Its totient is φ = 19004592.

The previous prime is 20632259. The next prime is 20632277. The reversal of 20632261 is 16223602.

It is a happy number.

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 20632261 - 2¹ = 20632259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20632361) 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, 5910 + ... + 8728.

It is an arithmetic number, because the mean of its divisors is an integer number (2783340).

Almost surely, 2^20632261 is an apocalyptic number.

It is an amenable number.

20632261 is a deficient number, since it is larger than the sum of its proper divisors (1634459).

20632261 is a wasteful number, since it uses less digits than its factorization.

20632261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20632261 is about 4542.2748705907. The cubic root of 20632261 is about 274.2725058098.

Adding to 20632261 its reverse (16223602), we get a palindrome (36855863).

The spelling of 20632261 in words is "twenty million, six hundred thirty-two thousand, two hundred sixty-one".