20968542 has 24 divisors (see below), whose sum is σ = 51922416. Its totient is φ = 5990976.

The previous prime is 20968523. The next prime is 20968559. The reversal of 20968542 is 24586902.

It is a happy number.

20968542 is a `hidden beast` number, since 20 + 96 + 8 + 542 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20968497 and 20968506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83083 + ... + 83334.

It is an arithmetic number, because the mean of its divisors is an integer number (2163434).

Almost surely, 2^20968542 is an apocalyptic number.

20968542 is an abundant number, since it is smaller than the sum of its proper divisors (30953874).

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

20968542 is a wasteful number, since it uses less digits than its factorization.

20968542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166432 (or 166429 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 20968542 is about 4579.1420593819. The cubic root of 20968542 is about 275.7545865110.

The spelling of 20968542 in words is "twenty million, nine hundred sixty-eight thousand, five hundred forty-two".