20113261 has 8 divisors (see below), whose sum is σ = 24338880. Its totient is φ = 16225728.

The previous prime is 20113253. The next prime is 20113271. The reversal of 20113261 is 16231102.

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 20113261 - 2³ = 20113253 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 (20113231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84391 + ... + 84628.

It is an arithmetic number, because the mean of its divisors is an integer number (3042360).

Almost surely, 2^20113261 is an apocalyptic number.

It is an amenable number.

20113261 is a deficient number, since it is larger than the sum of its proper divisors (4225619).

20113261 is a wasteful number, since it uses less digits than its factorization.

20113261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169043.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 20113261 is about 4484.7810425928. The cubic root of 20113261 is about 271.9531935390.

Adding to 20113261 its reverse (16231102), we get a palindrome (36344363).

The spelling of 20113261 in words is "twenty million, one hundred thirteen thousand, two hundred sixty-one".