20010312169 has 2 divisors, whose sum is σ = 20010312170. Its totient is φ = 20010312168.

The previous prime is 20010312149. The next prime is 20010312187. The reversal of 20010312169 is 96121301002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17539029225 + 2471282944 = 132435^2 + 49712^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010312169 - 2¹³ = 20010303977 is a prime.

It is a super-2 number, since 2×20010312169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20010312149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005156084 + 10005156085.

It is an arithmetic number, because the mean of its divisors is an integer number (10005156085).

Almost surely, 2^20010312169 is an apocalyptic number.

It is an amenable number.

20010312169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010312169 is an equidigital number, since it uses as much as digits as its factorization.

20010312169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 20010312169 in words is "twenty billion, ten million, three hundred twelve thousand, one hundred sixty-nine".