20310303157 has 4 divisors (see below), whose sum is σ = 21193359840. Its totient is φ = 19427246476.

The previous prime is 20310303113. The next prime is 20310303161. The reversal of 20310303157 is 75130301302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20310303157 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 (20310303857) 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, 441528307 + ... + 441528352.

It is an arithmetic number, because the mean of its divisors is an integer number (5298339960).

Almost surely, 2^20310303157 is an apocalyptic number.

It is an amenable number.

20310303157 is a deficient number, since it is larger than the sum of its proper divisors (883056683).

20310303157 is an equidigital number, since it uses as much as digits as its factorization.

20310303157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883056682.

The product of its (nonzero) digits is 1890, while the sum is 25.

Adding to 20310303157 its reverse (75130301302), we get a palindrome (95440604459).

The spelling of 20310303157 in words is "twenty billion, three hundred ten million, three hundred three thousand, one hundred fifty-seven".