20290841 has 4 divisors (see below), whose sum is σ = 21358800. Its totient is φ = 19222884.

The previous prime is 20290819. The next prime is 20290847. The reversal of 20290841 is 14809202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20290841 - 2¹⁰ = 20289817 is a prime.

It is a super-3 number, since 3×20290841³ (a number of 23 digits) contains 333 as substring.

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 20290841.

It is not an unprimeable number, because it can be changed into a prime (20290847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533951 + ... + 533988.

It is an arithmetic number, because the mean of its divisors is an integer number (5339700).

Almost surely, 2^20290841 is an apocalyptic number.

It is an amenable number.

20290841 is a deficient number, since it is larger than the sum of its proper divisors (1067959).

20290841 is a wasteful number, since it uses less digits than its factorization.

20290841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067958.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 20290841 is about 4504.5356031449. The cubic root of 20290841 is about 272.7512079027.

The spelling of 20290841 in words is "twenty million, two hundred ninety thousand, eight hundred forty-one".