20313611 has 2 divisors, whose sum is σ = 20313612. Its totient is φ = 20313610.

The previous prime is 20313607. The next prime is 20313619. The reversal of 20313611 is 11631302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20313611 - 2² = 20313607 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20313611.

It is not a weakly prime, because it can be changed into another prime (20313619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156805 + 10156806.

It is an arithmetic number, because the mean of its divisors is an integer number (10156806).

Almost surely, 2^20313611 is an apocalyptic number.

20313611 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313611 is an equidigital number, since it uses as much as digits as its factorization.

20313611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 20313611 is about 4507.0623470283. The cubic root of 20313611 is about 272.8531951874.

Adding to 20313611 its reverse (11631302), we get a palindrome (31944913).

The spelling of 20313611 in words is "twenty million, three hundred thirteen thousand, six hundred eleven".