20613011 has 4 divisors (see below), whose sum is σ = 20642400. Its totient is φ = 20583624.

The previous prime is 20612957. The next prime is 20613029. The reversal of 20613011 is 11031602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11031602 = 2 ⋅5515801.

It is a cyclic number.

It is not a de Polignac number, because 20613011 - 2⁶ = 20612947 is a prime.

It is a super-2 number, since 2×20613011² = 849792444972242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20613031) 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 3 ways as a sum of consecutive naturals, for example, 13616 + ... + 15053.

It is an arithmetic number, because the mean of its divisors is an integer number (5160600).

Almost surely, 2^20613011 is an apocalyptic number.

20613011 is a deficient number, since it is larger than the sum of its proper divisors (29389).

20613011 is an equidigital number, since it uses as much as digits as its factorization.

20613011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29388.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 20613011 is about 4540.1553938164. The cubic root of 20613011 is about 274.1871800732.

Adding to 20613011 its reverse (11031602), we get a palindrome (31644613).

The spelling of 20613011 in words is "twenty million, six hundred thirteen thousand, eleven".