20534293 has 4 divisors (see below), whose sum is σ = 22113868. Its totient is φ = 18954720.

The previous prime is 20534281. The next prime is 20534303. The reversal of 20534293 is 39243502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13527684 + 7006609 = 3678^2 + 2647^2 .

It is a cyclic number.

It is not a de Polignac number, because 20534293 - 2¹⁷ = 20403221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20534273) 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 3 ways as a sum of consecutive naturals, for example, 789768 + ... + 789793.

It is an arithmetic number, because the mean of its divisors is an integer number (5528467).

Almost surely, 2^20534293 is an apocalyptic number.

It is an amenable number.

20534293 is a deficient number, since it is larger than the sum of its proper divisors (1579575).

20534293 is a wasteful number, since it uses less digits than its factorization.

20534293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579574.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 20534293 is about 4531.4780149527. The cubic root of 20534293 is about 273.8377082509.

Adding to 20534293 its reverse (39243502), we get a palindrome (59777795).

The spelling of 20534293 in words is "twenty million, five hundred thirty-four thousand, two hundred ninety-three".