20195385 has 64 divisors (see below), whose sum is σ = 39813120. Its totient is φ = 8536320.

The previous prime is 20195369. The next prime is 20195387. The reversal of 20195385 is 58359102.

It is not a de Polignac number, because 20195385 - 2⁴ = 20195369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20195387) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 105640 + ... + 105830.

It is an arithmetic number, because the mean of its divisors is an integer number (622080).

Almost surely, 2^20195385 is an apocalyptic number.

It is an amenable number.

20195385 is a deficient number, since it is larger than the sum of its proper divisors (19617735).

20195385 is a wasteful number, since it uses less digits than its factorization.

20195385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 20195385 is about 4493.9275695098. The cubic root of 20195385 is about 272.3228262213.

The spelling of 20195385 in words is "twenty million, one hundred ninety-five thousand, three hundred eighty-five".