20412641 has 4 divisors (see below), whose sum is σ = 20964372. Its totient is φ = 19860912.

The previous prime is 20412599. The next prime is 20412647. The reversal of 20412641 is 14621402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14621402 = 2 ⋅7310701.

It can be written as a sum of positive squares in 2 ways, for example, as 11833600 + 8579041 = 3440^2 + 2929^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20412641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20412647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275810 + ... + 275883.

It is an arithmetic number, because the mean of its divisors is an integer number (5241093).

Almost surely, 2^20412641 is an apocalyptic number.

It is an amenable number.

20412641 is a deficient number, since it is larger than the sum of its proper divisors (551731).

20412641 is an equidigital number, since it uses as much as digits as its factorization.

20412641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551730.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20412641 is about 4518.0350817584. The cubic root of 20412641 is about 273.2958681877.

The spelling of 20412641 in words is "twenty million, four hundred twelve thousand, six hundred forty-one".