20534383 has 4 divisors (see below), whose sum is σ = 21615160. Its totient is φ = 19453608.

The previous prime is 20534359. The next prime is 20534387. The reversal of 20534383 is 38343502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20534383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20534387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540360 + ... + 540397.

It is an arithmetic number, because the mean of its divisors is an integer number (5403790).

Almost surely, 2^20534383 is an apocalyptic number.

20534383 is a deficient number, since it is larger than the sum of its proper divisors (1080777).

20534383 is a wasteful number, since it uses less digits than its factorization.

20534383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080776.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 20534383 is about 4531.4879454766. The cubic root of 20534383 is about 273.8381083192.

Adding to 20534383 its reverse (38343502), we get a palindrome (58877885).

The spelling of 20534383 in words is "twenty million, five hundred thirty-four thousand, three hundred eighty-three".