20542130 has 16 divisors (see below), whose sum is σ = 42258240. Its totient is φ = 7042992.

The previous prime is 20542099. The next prime is 20542153. The reversal of 20542130 is 3124502.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20542099 and 20542108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146660 + ... + 146799.

It is an arithmetic number, because the mean of its divisors is an integer number (2641140).

Almost surely, 2^20542130 is an apocalyptic number.

20542130 is an abundant number, since it is smaller than the sum of its proper divisors (21716110).

20542130 is a wasteful number, since it uses less digits than its factorization.

20542130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293473.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20542130 is about 4532.3426613618. The cubic root of 20542130 is about 273.8725409275.

Adding to 20542130 its reverse (3124502), we get a palindrome (23666632).

The spelling of 20542130 in words is "twenty million, five hundred forty-two thousand, one hundred thirty".