20582261 has 8 divisors (see below), whose sum is σ = 23854464. Its totient is φ = 17393040.

The previous prime is 20582227. The next prime is 20582273. The reversal of 20582261 is 16228502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20582261 - 2⁶ = 20582197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20582261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20582561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20210 + ... + 21203.

It is an arithmetic number, because the mean of its divisors is an integer number (2981808).

Almost surely, 2^20582261 is an apocalyptic number.

It is an amenable number.

20582261 is a deficient number, since it is larger than the sum of its proper divisors (3272203).

20582261 is an equidigital number, since it uses as much as digits as its factorization.

20582261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41491.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 20582261 is about 4536.7676819515. The cubic root of 20582261 is about 274.0507702464.

The spelling of 20582261 in words is "twenty million, five hundred eighty-two thousand, two hundred sixty-one".