20534263 has 8 divisors (see below), whose sum is σ = 21212928. Its totient is φ = 19864824.

The previous prime is 20534257. The next prime is 20534273. The reversal of 20534263 is 36243502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20534263 - 2¹³ = 20526071 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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2370 + ... + 6832.

It is an arithmetic number, because the mean of its divisors is an integer number (2651616).

Almost surely, 2^20534263 is an apocalyptic number.

20534263 is a deficient number, since it is larger than the sum of its proper divisors (678665).

20534263 is a wasteful number, since it uses less digits than its factorization.

20534263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4613.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 20534263 is about 4531.4747047733. The cubic root of 20534263 is about 273.8375748946.

Adding to 20534263 its reverse (36243502), we get a palindrome (56777765).

The spelling of 20534263 in words is "twenty million, five hundred thirty-four thousand, two hundred sixty-three".