20478041 has 8 divisors (see below), whose sum is σ = 21047040. Its totient is φ = 19914688.

The previous prime is 20478037. The next prime is 20478043. The reversal of 20478041 is 14087402.

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 20478041 - 2² = 20478037 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 20478041.

It is not an unprimeable number, because it can be changed into a prime (20478043) 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, 6545 + ... + 9153.

It is an arithmetic number, because the mean of its divisors is an integer number (2630880).

Almost surely, 2^20478041 is an apocalyptic number.

It is an amenable number.

20478041 is a deficient number, since it is larger than the sum of its proper divisors (568999).

20478041 is a wasteful number, since it uses less digits than its factorization.

20478041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 20478041 is about 4525.2669534515. The cubic root of 20478041 is about 273.5874276409.

The spelling of 20478041 in words is "twenty million, four hundred seventy-eight thousand, forty-one".