20400341 has 4 divisors (see below), whose sum is σ = 21969612. Its totient is φ = 18831072.

The previous prime is 20400337. The next prime is 20400349. The reversal of 20400341 is 14300402.

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 9278116 + 11122225 = 3046^2 + 3335^2 .

It is not a de Polignac number, because 20400341 - 2² = 20400337 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400349) 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, 784616 + ... + 784641.

It is an arithmetic number, because the mean of its divisors is an integer number (5492403).

Almost surely, 2^20400341 is an apocalyptic number.

It is an amenable number.

20400341 is a deficient number, since it is larger than the sum of its proper divisors (1569271).

20400341 is a wasteful number, since it uses less digits than its factorization.

20400341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569270.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20400341 is about 4516.6736654312. The cubic root of 20400341 is about 273.2409640626.

Adding to 20400341 its reverse (14300402), we get a palindrome (34700743).

The spelling of 20400341 in words is "twenty million, four hundred thousand, three hundred forty-one".