20375869 has 2 divisors, whose sum is σ = 20375870. Its totient is φ = 20375868.

The previous prime is 20375867. The next prime is 20375881. The reversal of 20375869 is 96857302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19686969 + 688900 = 4437^2 + 830^2 .

It is a cyclic number.

It is not a de Polignac number, because 20375869 - 2¹ = 20375867 is a prime.

It is a super-2 number, since 2×20375869² = 830352075010322, which contains 22 as substring.

Together with 20375867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20375867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10187934 + 10187935.

It is an arithmetic number, because the mean of its divisors is an integer number (10187935).

Almost surely, 2^20375869 is an apocalyptic number.

It is an amenable number.

20375869 is a deficient number, since it is larger than the sum of its proper divisors (1).

20375869 is an equidigital number, since it uses as much as digits as its factorization.

20375869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 20375869 is about 4513.9637792078. The cubic root of 20375869 is about 273.1316615034.

The spelling of 20375869 in words is "twenty million, three hundred seventy-five thousand, eight hundred sixty-nine".