20236613 has 16 divisors (see below), whose sum is σ = 22080960. Its totient is φ = 18475776.

The previous prime is 20236609. The next prime is 20236621. The reversal of 20236613 is 31663202.

It is a cyclic number.

It is not a de Polignac number, because 20236613 - 2² = 20236609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20236673) 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 15 ways as a sum of consecutive naturals, for example, 124070 + ... + 124232.

It is an arithmetic number, because the mean of its divisors is an integer number (1380060).

Almost surely, 2^20236613 is an apocalyptic number.

It is an amenable number.

20236613 is a deficient number, since it is larger than the sum of its proper divisors (1844347).

20236613 is a wasteful number, since it uses less digits than its factorization.

20236613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 20236613 is about 4498.5123096419. The cubic root of 20236613 is about 272.5080119968.

Adding to 20236613 its reverse (31663202), we get a palindrome (51899815).

The spelling of 20236613 in words is "twenty million, two hundred thirty-six thousand, six hundred thirteen".