20022010997 has 2 divisors, whose sum is σ = 20022010998. Its totient is φ = 20022010996.

The previous prime is 20022010993. The next prime is 20022011027. The reversal of 20022010997 is 79901022002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18138971761 + 1883039236 = 134681^2 + 43394^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022010997 - 2² = 20022010993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20022010993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011005498 + 10011005499.

It is an arithmetic number, because the mean of its divisors is an integer number (10011005499).

Almost surely, 2^20022010997 is an apocalyptic number.

It is an amenable number.

20022010997 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022010997 is an equidigital number, since it uses as much as digits as its factorization.

20022010997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

Adding to 20022010997 its reverse (79901022002), we get a palindrome (99923032999).

The spelling of 20022010997 in words is "twenty billion, twenty-two million, ten thousand, nine hundred ninety-seven".