20331013 has 8 divisors (see below), whose sum is σ = 20557440. Its totient is φ = 20106240.

The previous prime is 20330993. The next prime is 20331023. The reversal of 20331013 is 31013302.

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 20331013 - 2²¹ = 18233861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20330984 and 20331002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331023) 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, 61258 + ... + 61588.

It is an arithmetic number, because the mean of its divisors is an integer number (2569680).

Almost surely, 2^20331013 is an apocalyptic number.

It is an amenable number.

20331013 is a deficient number, since it is larger than the sum of its proper divisors (226427).

20331013 is a wasteful number, since it uses less digits than its factorization.

20331013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827.

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

The square root of 20331013 is about 4508.9924595191. The cubic root of 20331013 is about 272.9310877241.

Adding to 20331013 its reverse (31013302), we get a palindrome (51344315).

The spelling of 20331013 in words is "twenty million, three hundred thirty-one thousand, thirteen".