20001130997 has 2 divisors, whose sum is σ = 20001130998. Its totient is φ = 20001130996.

The previous prime is 20001130949. The next prime is 20001131021. The reversal of 20001130997 is 79903110002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15018747601 + 4982383396 = 122551^2 + 70586^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001130997 - 2²² = 19996936693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001130927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000565498 + 10000565499.

It is an arithmetic number, because the mean of its divisors is an integer number (10000565499).

Almost surely, 2^20001130997 is an apocalyptic number.

It is an amenable number.

20001130997 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001130997 is an equidigital number, since it uses as much as digits as its factorization.

20001130997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 32.

Adding to 20001130997 its reverse (79903110002), we get a palindrome (99904240999).

The spelling of 20001130997 in words is "twenty billion, one million, one hundred thirty thousand, nine hundred ninety-seven".