20542608 has 30 divisors (see below), whose sum is σ = 57491174. Its totient is φ = 6847488.

The previous prime is 20542603. The next prime is 20542633. The reversal of 20542608 is 80624502.

20542608 is a `hidden beast` number, since 2 + 0 + 54 + 2 + 608 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11614464 + 8928144 = 3408^2 + 2988^2 .

It is not an unprimeable number, because it can be changed into a prime (20542603) 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 5 ways as a sum of consecutive naturals, for example, 71185 + ... + 71472.

Almost surely, 2^20542608 is an apocalyptic number.

It is an amenable number.

20542608 is an abundant number, since it is smaller than the sum of its proper divisors (36948566).

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

20542608 is a wasteful number, since it uses less digits than its factorization.

20542608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142671 (or 142662 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 20542608 is about 4532.3953931668. The cubic root of 20542608 is about 273.8746651807.

The spelling of 20542608 in words is "twenty million, five hundred forty-two thousand, six hundred eight".