20810690269 has 2 divisors, whose sum is σ = 20810690270. Its totient is φ = 20810690268.

The previous prime is 20810690231. The next prime is 20810690273. The reversal of 20810690269 is 96209601802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20096464644 + 714225625 = 141762^2 + 26725^2 .

It is a cyclic number.

It is not a de Polignac number, because 20810690269 - 2⁷ = 20810690141 is a prime.

It is a super-2 number, since 2×20810690269² (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 (20810690279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10405345134 + 10405345135.

It is an arithmetic number, because the mean of its divisors is an integer number (10405345135).

Almost surely, 2^20810690269 is an apocalyptic number.

It is an amenable number.

20810690269 is a deficient number, since it is larger than the sum of its proper divisors (1).

20810690269 is an equidigital number, since it uses as much as digits as its factorization.

20810690269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 20810690269 in words is "twenty billion, eight hundred ten million, six hundred ninety thousand, two hundred sixty-nine".