20226513 has 4 divisors (see below), whose sum is σ = 26968688. Its totient is φ = 13484340.

The previous prime is 20226511. The next prime is 20226517. The reversal of 20226513 is 31562202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20226513 - 2¹ = 20226511 is a prime.

It is a super-2 number, since 2×20226513² = 818223656278338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20226513.

It is not an unprimeable number, because it can be changed into a prime (20226511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3371083 + ... + 3371088.

It is an arithmetic number, because the mean of its divisors is an integer number (6742172).

Almost surely, 2^20226513 is an apocalyptic number.

It is an amenable number.

20226513 is a deficient number, since it is larger than the sum of its proper divisors (6742175).

20226513 is an equidigital number, since it uses as much as digits as its factorization.

20226513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6742174.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20226513 is about 4497.3895761875. The cubic root of 20226513 is about 272.4626686228.

Adding to 20226513 its reverse (31562202), we get a palindrome (51788715).

The spelling of 20226513 in words is "twenty million, two hundred twenty-six thousand, five hundred thirteen".