20285733 has 16 divisors (see below), whose sum is σ = 29609216. Its totient is φ = 12277440.

The previous prime is 20285729. The next prime is 20285737. The reversal of 20285733 is 33758202.

It is an interprime number because it is at equal distance from previous prime (20285729) and next prime (20285737).

It is not a de Polignac number, because 20285733 - 2² = 20285729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20285733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20285737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1885 + ... + 6642.

It is an arithmetic number, because the mean of its divisors is an integer number (1850576).

Almost surely, 2^20285733 is an apocalyptic number.

It is an amenable number.

20285733 is a deficient number, since it is larger than the sum of its proper divisors (9323483).

20285733 is a wasteful number, since it uses less digits than its factorization.

20285733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8604.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 20285733 is about 4503.9685833718. The cubic root of 20285733 is about 272.7283185919.

The spelling of 20285733 in words is "twenty million, two hundred eighty-five thousand, seven hundred thirty-three".