20552347 has 4 divisors (see below), whose sum is σ = 20833960. Its totient is φ = 20270736.

The previous prime is 20552341. The next prime is 20552351. The reversal of 20552347 is 74325502.

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 20552347 - 2³ = 20552339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20552341) 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, 140697 + ... + 140842.

It is an arithmetic number, because the mean of its divisors is an integer number (5208490).

Almost surely, 2^20552347 is an apocalyptic number.

20552347 is a deficient number, since it is larger than the sum of its proper divisors (281613).

20552347 is an equidigital number, since it uses as much as digits as its factorization.

20552347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281612.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 20552347 is about 4533.4696425586. The cubic root of 20552347 is about 273.9179385562.

Adding to 20552347 its reverse (74325502), we get a palindrome (94877849).

The spelling of 20552347 in words is "twenty million, five hundred fifty-two thousand, three hundred forty-seven".