20136313 has 4 divisors (see below), whose sum is σ = 21320820. Its totient is φ = 18951808.

The previous prime is 20136301. The next prime is 20136331. The reversal of 20136313 is 31363102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7689529 + 12446784 = 2773^2 + 3528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20136313 is a prime.

It is a super-2 number, since 2×20136313² = 810942202467938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20136383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592228 + ... + 592261.

It is an arithmetic number, because the mean of its divisors is an integer number (5330205).

Almost surely, 2^20136313 is an apocalyptic number.

It is an amenable number.

20136313 is a deficient number, since it is larger than the sum of its proper divisors (1184507).

20136313 is a wasteful number, since it uses less digits than its factorization.

20136313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184506.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 20136313 is about 4487.3503317660. The cubic root of 20136313 is about 272.0570499206.

Adding to 20136313 its reverse (31363102), we get a palindrome (51499415).

It can be divided in two parts, 20136 and 313, that added together give a square (20449 = 143²).

The spelling of 20136313 in words is "twenty million, one hundred thirty-six thousand, three hundred thirteen".