20310157 has 12 divisors (see below), whose sum is σ = 24131520. Its totient is φ = 17036376.

The previous prime is 20310137. The next prime is 20310163. The reversal of 20310157 is 75101302.

It is not a de Polignac number, because 20310157 - 2⁷ = 20310029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2107 + ... + 6712.

It is an arithmetic number, because the mean of its divisors is an integer number (2010960).

Almost surely, 2^20310157 is an apocalyptic number.

It is an amenable number.

20310157 is a deficient number, since it is larger than the sum of its proper divisors (3821363).

20310157 is an equidigital number, since it uses as much as digits as its factorization.

20310157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8880 (or 8873 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 20310157 is about 4506.6791543219. The cubic root of 20310157 is about 272.8377295577.

Adding to 20310157 its reverse (75101302), we get a palindrome (95411459).

The spelling of 20310157 in words is "twenty million, three hundred ten thousand, one hundred fifty-seven".