20386261 has 8 divisors (see below), whose sum is σ = 23681024. Its totient is φ = 17187120.

The previous prime is 20386253. The next prime is 20386271. The reversal of 20386261 is 16268302.

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 20386261 - 2³ = 20386253 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 (20386241) 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, 23445 + ... + 24298.

It is an arithmetic number, because the mean of its divisors is an integer number (2960128).

Almost surely, 2^20386261 is an apocalyptic number.

It is an amenable number.

20386261 is a deficient number, since it is larger than the sum of its proper divisors (3294763).

20386261 is an equidigital number, since it uses as much as digits as its factorization.

20386261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47811.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20386261 is about 4515.1147272245. The cubic root of 20386261 is about 273.1780873650.

The spelling of 20386261 in words is "twenty million, three hundred eighty-six thousand, two hundred sixty-one".