20043513 has 24 divisors (see below), whose sum is σ = 33561216. Its totient is φ = 11289600.

The previous prime is 20043469. The next prime is 20043559. The reversal of 20043513 is 31534002.

It is not a de Polignac number, because 20043513 - 2¹⁰ = 20042489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043713) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2233 + ... + 6713.

It is an arithmetic number, because the mean of its divisors is an integer number (1398384).

Almost surely, 2^20043513 is an apocalyptic number.

It is an amenable number.

20043513 is a deficient number, since it is larger than the sum of its proper divisors (13517703).

20043513 is a wasteful number, since it uses less digits than its factorization.

20043513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4565 (or 4562 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20043513 is about 4476.9982130888. The cubic root of 20043513 is about 271.6384731595.

Adding to 20043513 its reverse (31534002), we get a palindrome (51577515).

The spelling of 20043513 in words is "twenty million, forty-three thousand, five hundred thirteen".