20532347 has 4 divisors (see below), whose sum is σ = 22398936. Its totient is φ = 18665760.

The previous prime is 20532341. The next prime is 20532361. The reversal of 20532347 is 74323502.

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

It is a cyclic number.

It is not a de Polignac number, because 20532347 - 2¹² = 20528251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20532341) 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, 933278 + ... + 933299.

It is an arithmetic number, because the mean of its divisors is an integer number (5599734).

Almost surely, 2^20532347 is an apocalyptic number.

20532347 is a deficient number, since it is larger than the sum of its proper divisors (1866589).

20532347 is a wasteful number, since it uses less digits than its factorization.

20532347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866588.

The product of its (nonzero) digits is 5040, while the sum is 26.

The square root of 20532347 is about 4531.2632896357. The cubic root of 20532347 is about 273.8290575998.

Adding to 20532347 its reverse (74323502), we get a palindrome (94855849).

The spelling of 20532347 in words is "twenty million, five hundred thirty-two thousand, three hundred forty-seven".