20301331 has 4 divisors (see below), whose sum is σ = 20461312. Its totient is φ = 20141352.

The previous prime is 20301319. The next prime is 20301353. The reversal of 20301331 is 13310302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20301331 - 2¹³ = 20293139 is a prime.

It is a super-2 number, since 2×20301331² = 824288080743122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20301301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79800 + ... + 80053.

It is an arithmetic number, because the mean of its divisors is an integer number (5115328).

Almost surely, 2^20301331 is an apocalyptic number.

20301331 is a deficient number, since it is larger than the sum of its proper divisors (159981).

20301331 is a wasteful number, since it uses less digits than its factorization.

20301331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159980.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 20301331 is about 4505.6998346539. The cubic root of 20301331 is about 272.7982022955.

Adding to 20301331 its reverse (13310302), we get a palindrome (33611633).

The spelling of 20301331 in words is "twenty million, three hundred one thousand, three hundred thirty-one".