20335869 has 12 divisors (see below), whose sum is σ = 29590236. Its totient is φ = 13457472.

The previous prime is 20335853. The next prime is 20335879. The reversal of 20335869 is 96853302.

It can be written as a sum of positive squares in 2 ways, for example, as 5008644 + 15327225 = 2238^2 + 3915^2 .

It is not a de Polignac number, because 20335869 - 2⁴ = 20335853 is a prime.

It is a super-2 number, since 2×20335869² = 827095135970322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20335849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7014 + ... + 9479.

It is an arithmetic number, because the mean of its divisors is an integer number (2465853).

Almost surely, 2^20335869 is an apocalyptic number.

It is an amenable number.

20335869 is a deficient number, since it is larger than the sum of its proper divisors (9254367).

20335869 is a wasteful number, since it uses less digits than its factorization.

20335869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16636 (or 16633 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 20335869 is about 4509.5309068683. The cubic root of 20335869 is about 272.9528155783.

The spelling of 20335869 in words is "twenty million, three hundred thirty-five thousand, eight hundred sixty-nine".