20169846 has 12 divisors (see below), whose sum is σ = 43701372. Its totient is φ = 6723276.

The previous prime is 20169841. The next prime is 20169859. The reversal of 20169846 is 64896102.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20169846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20169841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 560256 + ... + 560291.

It is an arithmetic number, because the mean of its divisors is an integer number (3641781).

Almost surely, 2^20169846 is an apocalyptic number.

20169846 is an abundant number, since it is smaller than the sum of its proper divisors (23531526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20169846 is a wasteful number, since it uses less digits than its factorization.

20169846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120555 (or 1120552 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 20169846 is about 4491.0851695331. The cubic root of 20169846 is about 272.2079850268.

The spelling of 20169846 in words is "twenty million, one hundred sixty-nine thousand, eight hundred forty-six".