20578341 has 8 divisors (see below), whose sum is σ = 31357504. Its totient is φ = 11759040.

The previous prime is 20578331. The next prime is 20578343. The reversal of 20578341 is 14387502.

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

It is not a de Polignac number, because 20578341 - 2⁶ = 20578277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20578299 and 20578308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20578343) 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, 489940 + ... + 489981.

It is an arithmetic number, because the mean of its divisors is an integer number (3919688).

Almost surely, 2^20578341 is an apocalyptic number.

20578341 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20578341 is a deficient number, since it is larger than the sum of its proper divisors (10779163).

20578341 is an equidigital number, since it uses as much as digits as its factorization.

20578341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979931.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20578341 is about 4536.3356357307. The cubic root of 20578341 is about 274.0333710043.

The spelling of 20578341 in words is "twenty million, five hundred seventy-eight thousand, three hundred forty-one".