20545441 has 16 divisors (see below), whose sum is σ = 24883200. Its totient is φ = 16571088.

The previous prime is 20545433. The next prime is 20545477. The reversal of 20545441 is 14454502.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20545441 - 2³ = 20545433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20545411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23376 + ... + 24238.

It is an arithmetic number, because the mean of its divisors is an integer number (1555200).

Almost surely, 2^20545441 is an apocalyptic number.

It is an amenable number.

20545441 is a deficient number, since it is larger than the sum of its proper divisors (4337759).

20545441 is a wasteful number, since it uses less digits than its factorization.

20545441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 20545441 is about 4532.7079102894. The cubic root of 20545441 is about 273.8872544823.

Adding to 20545441 its reverse (14454502), we get a palindrome (34999943).

The spelling of 20545441 in words is "twenty million, five hundred forty-five thousand, four hundred forty-one".