20321113 has 8 divisors (see below), whose sum is σ = 20820096. Its totient is φ = 19827600.

The previous prime is 20321087. The next prime is 20321131. The reversal of 20321113 is 31112302.

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 20321113 - 2¹³ = 20312921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20321093 and 20321102.

It is not an unprimeable number, because it can be changed into a prime (20321153) 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, 6720 + ... + 9262.

It is an arithmetic number, because the mean of its divisors is an integer number (2602512).

Almost surely, 2^20321113 is an apocalyptic number.

It is an amenable number.

20321113 is a deficient number, since it is larger than the sum of its proper divisors (498983).

20321113 is a wasteful number, since it uses less digits than its factorization.

20321113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 20321113 is about 4507.8945196178. The cubic root of 20321113 is about 272.8867801030.

Adding to 20321113 its reverse (31112302), we get a palindrome (51433415).

It can be divided in two parts, 203 and 21113, that added together give a square (21316 = 146²).

The spelling of 20321113 in words is "twenty million, three hundred twenty-one thousand, one hundred thirteen".