20244513 has 16 divisors (see below), whose sum is σ = 27865856. Its totient is φ = 13063680.

The previous prime is 20244509. The next prime is 20244517. The reversal of 20244513 is 31544202.

It is an interprime number because it is at equal distance from previous prime (20244509) and next prime (20244517).

It is not a de Polignac number, because 20244513 - 2² = 20244509 is a prime.

It is a Duffinian number.

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 20244513.

It is not an unprimeable number, because it can be changed into a prime (20244517) 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, 29745 + ... + 30417.

It is an arithmetic number, because the mean of its divisors is an integer number (1741616).

Almost surely, 2^20244513 is an apocalyptic number.

It is an amenable number.

20244513 is a deficient number, since it is larger than the sum of its proper divisors (7621343).

20244513 is a wasteful number, since it uses less digits than its factorization.

20244513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20244513 is about 4499.3902920285. The cubic root of 20244513 is about 272.5434680819.

Adding to 20244513 its reverse (31544202), we get a palindrome (51788715).

The spelling of 20244513 in words is "twenty million, two hundred forty-four thousand, five hundred thirteen".