20636313 has 16 divisors (see below), whose sum is σ = 29704320. Its totient is φ = 12704384.

The previous prime is 20636311. The next prime is 20636321. The reversal of 20636313 is 31363602.

It is a cyclic number.

It is not a de Polignac number, because 20636313 - 2¹ = 20636311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20636311) 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 15 ways as a sum of consecutive naturals, for example, 3156 + ... + 7157.

It is an arithmetic number, because the mean of its divisors is an integer number (1856520).

Almost surely, 2^20636313 is an apocalyptic number.

20636313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20636313 is a deficient number, since it is larger than the sum of its proper divisors (9068007).

20636313 is a wasteful number, since it uses less digits than its factorization.

20636313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10368.

The product of its (nonzero) digits is 1944, while the sum is 24.

The square root of 20636313 is about 4542.7208807057. The cubic root of 20636313 is about 274.2904595611.

Adding to 20636313 its reverse (31363602), we get a palindrome (51999915).

The spelling of 20636313 in words is "twenty million, six hundred thirty-six thousand, three hundred thirteen".