20675385 has 16 divisors (see below), whose sum is σ = 36756480. Its totient is φ = 11026800.

The previous prime is 20675381. The next prime is 20675399. The reversal of 20675385 is 58357602.

20675385 is a `hidden beast` number, since 206 + 75 + 385 = 666.

It is not a de Polignac number, because 20675385 - 2² = 20675381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20675381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76441 + ... + 76710.

It is an arithmetic number, because the mean of its divisors is an integer number (2297280).

Almost surely, 2^20675385 is an apocalyptic number.

It is an amenable number.

20675385 is a deficient number, since it is larger than the sum of its proper divisors (16081095).

20675385 is a wasteful number, since it uses less digits than its factorization.

20675385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153165 (or 153159 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 20675385 is about 4547.0193533787. The cubic root of 20675385 is about 274.4634607520.

The spelling of 20675385 in words is "twenty million, six hundred seventy-five thousand, three hundred eighty-five".