20311039 has 24 divisors (see below), whose sum is σ = 25732080. Its totient is φ = 15918336.

The previous prime is 20310973. The next prime is 20311043. The reversal of 20311039 is 93011302.

It is not a de Polignac number, because 20311039 - 2⁷ = 20310911 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 (20311069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30492 + ... + 31150.

It is an arithmetic number, because the mean of its divisors is an integer number (1072170).

Almost surely, 2^20311039 is an apocalyptic number.

20311039 is a deficient number, since it is larger than the sum of its proper divisors (5421041).

20311039 is a wasteful number, since it uses less digits than its factorization.

20311039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 20311039 is about 4506.7770080180. Note that the first 3 decimals coincide. The cubic root of 20311039 is about 272.8416789674.

The spelling of 20311039 in words is "twenty million, three hundred eleven thousand, thirty-nine".