20520361 has 8 divisors (see below), whose sum is σ = 21674880. Its totient is φ = 19373328.

The previous prime is 20520337. The next prime is 20520389. The reversal of 20520361 is 16302502.

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 20520361 - 2¹³ = 20512169 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20520061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4320 + ... + 7726.

It is an arithmetic number, because the mean of its divisors is an integer number (2709360).

Almost surely, 2^20520361 is an apocalyptic number.

It is an amenable number.

20520361 is a deficient number, since it is larger than the sum of its proper divisors (1154519).

20520361 is a wasteful number, since it uses less digits than its factorization.

20520361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3743.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20520361 is about 4529.9405073356. The cubic root of 20520361 is about 273.7757635795.

Adding to 20520361 its reverse (16302502), we get a palindrome (36822863).

The spelling of 20520361 in words is "twenty million, five hundred twenty thousand, three hundred sixty-one".