20030302991 has 2 divisors, whose sum is σ = 20030302992. Its totient is φ = 20030302990.

The previous prime is 20030302939. The next prime is 20030303039. The reversal of 20030302991 is 19920303002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20030302991 - 2⁶ = 20030302927 is a prime.

It is a super-2 number, since 2×20030302991² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20030304991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10015151495 + 10015151496.

It is an arithmetic number, because the mean of its divisors is an integer number (10015151496).

Almost surely, 2^20030302991 is an apocalyptic number.

20030302991 is a deficient number, since it is larger than the sum of its proper divisors (1).

20030302991 is an equidigital number, since it uses as much as digits as its factorization.

20030302991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 29.

Adding to 20030302991 its reverse (19920303002), we get a palindrome (39950605993).

The spelling of 20030302991 in words is "twenty billion, thirty million, three hundred two thousand, nine hundred ninety-one".