20043261 has 32 divisors (see below), whose sum is σ = 34187520. Its totient is φ = 11368512.

The previous prime is 20043259. The next prime is 20043269. The reversal of 20043261 is 16234002.

It is a happy number.

It is not a de Polignac number, because 20043261 - 2¹ = 20043259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043269) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32391 + ... + 33003.

It is an arithmetic number, because the mean of its divisors is an integer number (1068360).

Almost surely, 2^20043261 is an apocalyptic number.

20043261 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20043261 is a deficient number, since it is larger than the sum of its proper divisors (14144259).

20043261 is a wasteful number, since it uses less digits than its factorization.

20043261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802 (or 796 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20043261 is about 4476.9700691427. The cubic root of 20043261 is about 271.6373347499.

Adding to 20043261 its reverse (16234002), we get a palindrome (36277263).

The spelling of 20043261 in words is "twenty million, forty-three thousand, two hundred sixty-one".