20331210169 has 2 divisors, whose sum is σ = 20331210170. Its totient is φ = 20331210168.

The previous prime is 20331210131. The next prime is 20331210173. The reversal of 20331210169 is 96101213302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14759334144 + 5571876025 = 121488^2 + 74645^2 .

It is a cyclic number.

It is not a de Polignac number, because 20331210169 - 2³¹ = 18183726521 is a prime.

It is a super-2 number, since 2×20331210169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20331210199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165605084 + 10165605085.

It is an arithmetic number, because the mean of its divisors is an integer number (10165605085).

Almost surely, 2^20331210169 is an apocalyptic number.

It is an amenable number.

20331210169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331210169 is an equidigital number, since it uses as much as digits as its factorization.

20331210169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 20331210169 in words is "twenty billion, three hundred thirty-one million, two hundred ten thousand, one hundred sixty-nine".