20310323220 has 144 divisors (see below), whose sum is σ = 70746137280. Its totient is φ = 4664563200.

The previous prime is 20310323219. The next prime is 20310323273. The reversal of 20310323220 is 2232301302.

It is a happy number.

20310323220 is a `hidden beast` number, since 2 + 0 + 310 + 32 + 322 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20310323193 and 20310323202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 232321 + ... + 307560.

It is an arithmetic number, because the mean of its divisors is an integer number (491292620).

Almost surely, 2^20310323220 is an apocalyptic number.

20310323220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20310323220 is an abundant number, since it is smaller than the sum of its proper divisors (50435814060).

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

20310323220 is a wasteful number, since it uses less digits than its factorization.

20310323220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539926 (or 539921 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20310323220 its reverse (2232301302), we get a palindrome (22542624522).

The spelling of 20310323220 in words is "twenty billion, three hundred ten million, three hundred twenty-three thousand, two hundred twenty".