20243513 has 8 divisors (see below), whose sum is σ = 20647680. Its totient is φ = 19843200.

The previous prime is 20243507. The next prime is 20243533. The reversal of 20243513 is 31534202.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20243513 - 2¹⁶ = 20177977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20243533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11081 + ... + 12777.

It is an arithmetic number, because the mean of its divisors is an integer number (2580960).

Almost surely, 2^20243513 is an apocalyptic number.

It is an amenable number.

20243513 is a deficient number, since it is larger than the sum of its proper divisors (404167).

20243513 is a wasteful number, since it uses less digits than its factorization.

20243513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20243513 is about 4499.2791644885. The cubic root of 20243513 is about 272.5389804798.

Adding to 20243513 its reverse (31534202), we get a palindrome (51777715).

The spelling of 20243513 in words is "twenty million, two hundred forty-three thousand, five hundred thirteen".