20535912 has 24 divisors (see below), whose sum is σ = 55618290. Its totient is φ = 6845280.

The previous prime is 20535901. The next prime is 20535917. The reversal of 20535912 is 21953502.

20535912 is a `hidden beast` number, since 20 + 53 + 591 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15634116 + 4901796 = 3954^2 + 2214^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (20535917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142539 + ... + 142682.

Almost surely, 2^20535912 is an apocalyptic number.

It is an amenable number.

20535912 is an abundant number, since it is smaller than the sum of its proper divisors (35082378).

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

20535912 is a wasteful number, since it uses less digits than its factorization.

20535912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285233 (or 285226 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 20535912 is about 4531.6566507184. The cubic root of 20535912 is about 273.8449048561.

The spelling of 20535912 in words is "twenty million, five hundred thirty-five thousand, nine hundred twelve".