20331011 has 8 divisors (see below), whose sum is σ = 21507360. Its totient is φ = 19179072.

The previous prime is 20330993. The next prime is 20331023. The reversal of 20331011 is 11013302.

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 20331011 - 2¹⁴ = 20314627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20330983 and 20331001.

It is not an unprimeable number, because it can be changed into a prime (20331061) 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, 4376 + ... + 7733.

It is an arithmetic number, because the mean of its divisors is an integer number (2688420).

Almost surely, 2^20331011 is an apocalyptic number.

20331011 is a deficient number, since it is larger than the sum of its proper divisors (1176349).

20331011 is a wasteful number, since it uses less digits than its factorization.

20331011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12205.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 20331011 is about 4508.9922377400. The cubic root of 20331011 is about 272.9310787746.

Adding to 20331011 its reverse (11013302), we get a palindrome (31344313).

The spelling of 20331011 in words is "twenty million, three hundred thirty-one thousand, eleven".