20798441 has 4 divisors (see below), whose sum is σ = 20982612. Its totient is φ = 20614272.

The previous prime is 20798413. The next prime is 20798443. The reversal of 20798441 is 14489702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11587216 + 9211225 = 3404^2 + 3035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20798441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20798443) 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, 91916 + ... + 92141.

It is an arithmetic number, because the mean of its divisors is an integer number (5245653).

Almost surely, 2^20798441 is an apocalyptic number.

It is an amenable number.

20798441 is a deficient number, since it is larger than the sum of its proper divisors (184171).

20798441 is a wasteful number, since it uses less digits than its factorization.

20798441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184170.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 20798441 is about 4560.5307805123. The cubic root of 20798441 is about 275.0069023061.

The spelling of 20798441 in words is "twenty million, seven hundred ninety-eight thousand, four hundred forty-one".