20578241 has 8 divisors (see below), whose sum is σ = 20865600. Its totient is φ = 20293168.

The previous prime is 20578237. The next prime is 20578249. The reversal of 20578241 is 14287502.

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 20578241 - 2² = 20578237 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20578249) 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, 24470 + ... + 25296.

It is an arithmetic number, because the mean of its divisors is an integer number (2608200).

Almost surely, 2^20578241 is an apocalyptic number.

It is an amenable number.

20578241 is a deficient number, since it is larger than the sum of its proper divisors (287359).

20578241 is a wasteful number, since it uses less digits than its factorization.

20578241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 20578241 is about 4536.3246136052. The cubic root of 20578241 is about 274.0329271172.

The spelling of 20578241 in words is "twenty million, five hundred seventy-eight thousand, two hundred forty-one".