20534121 has 16 divisors (see below), whose sum is σ = 31403520. Its totient is φ = 13247280.

The previous prime is 20534099. The next prime is 20534141. The reversal of 20534121 is 12143502.

It is not a de Polignac number, because 20534121 - 2¹³ = 20525929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20534094 and 20534103.

It is not an unprimeable number, because it can be changed into a prime (20534141) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 11430 + ... + 13103.

It is an arithmetic number, because the mean of its divisors is an integer number (1962720).

Almost surely, 2^20534121 is an apocalyptic number.

It is an amenable number.

20534121 is a deficient number, since it is larger than the sum of its proper divisors (10869399).

20534121 is a wasteful number, since it uses less digits than its factorization.

20534121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24573 (or 24567 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20534121 is about 4531.4590365577. The cubic root of 20534121 is about 273.8369436727.

Adding to 20534121 its reverse (12143502), we get a palindrome (32677623).

The spelling of 20534121 in words is "twenty million, five hundred thirty-four thousand, one hundred twenty-one".