20753385 has 16 divisors (see below), whose sum is σ = 33276096. Its totient is φ = 11044928.

The previous prime is 20753333. The next prime is 20753393. The reversal of 20753385 is 58335702.

It is a cyclic number.

It is not a de Polignac number, because 20753385 - 2⁶ = 20753321 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7627 + ... + 9983.

It is an arithmetic number, because the mean of its divisors is an integer number (2079756).

Almost surely, 2^20753385 is an apocalyptic number.

It is an amenable number.

20753385 is a deficient number, since it is larger than the sum of its proper divisors (12522711).

20753385 is a wasteful number, since it uses less digits than its factorization.

20753385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2952.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 20753385 is about 4555.5883264404. The cubic root of 20753385 is about 274.8081747641.

It can be divided in two parts, 2075 and 3385, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 20753385 in words is "twenty million, seven hundred fifty-three thousand, three hundred eighty-five".