20313620 has 24 divisors (see below), whose sum is σ = 42747264. Its totient is φ = 8108576.

The previous prime is 20313619. The next prime is 20313647. The reversal of 20313620 is 2631302.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14177 + ... + 15543.

It is an arithmetic number, because the mean of its divisors is an integer number (1781136).

Almost surely, 2^20313620 is an apocalyptic number.

20313620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20313620 is an abundant number, since it is smaller than the sum of its proper divisors (22433644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20313620 is a wasteful number, since it uses less digits than its factorization.

20313620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2119 (or 2117 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 20313620 is about 4507.0633454612. The cubic root of 20313620 is about 272.8532354835.

Adding to 20313620 its reverse (2631302), we get a palindrome (22944922).

The spelling of 20313620 in words is "twenty million, three hundred thirteen thousand, six hundred twenty".