20003541 has 8 divisors (see below), whose sum is σ = 26721504. Its totient is φ = 13310640.

The previous prime is 20003521. The next prime is 20003549. The reversal of 20003541 is 14530002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20003541 - 2²² = 15809237 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20003541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003549) 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 7 ways as a sum of consecutive naturals, for example, 4315 + ... + 7656.

It is an arithmetic number, because the mean of its divisors is an integer number (3340188).

Almost surely, 2^20003541 is an apocalyptic number.

It is an amenable number.

20003541 is a deficient number, since it is larger than the sum of its proper divisors (6717963).

20003541 is a wasteful number, since it uses less digits than its factorization.

20003541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12531.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20003541 is about 4472.5318333132. The cubic root of 20003541 is about 271.4577803021.

Adding to 20003541 its reverse (14530002), we get a palindrome (34533543).

The spelling of 20003541 in words is "twenty million, three thousand, five hundred forty-one".