20313355 has 4 divisors (see below), whose sum is σ = 24376032. Its totient is φ = 16250680.

The previous prime is 20313343. The next prime is 20313361. The reversal of 20313355 is 55331302.

It is a happy number.

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

It is not a de Polignac number, because 20313355 - 2¹¹ = 20311307 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2031331 + ... + 2031340.

It is an arithmetic number, because the mean of its divisors is an integer number (6094008).

Almost surely, 2^20313355 is an apocalyptic number.

20313355 is a deficient number, since it is larger than the sum of its proper divisors (4062677).

20313355 is an equidigital number, since it uses as much as digits as its factorization.

20313355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4062676.

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 20313355 is about 4507.0339470654. The cubic root of 20313355 is about 272.8520489820.

Adding to 20313355 its reverse (55331302), we get a palindrome (75644657).

The spelling of 20313355 in words is "twenty million, three hundred thirteen thousand, three hundred fifty-five".