20213000221320 has 48 divisors (see below), whose sum is σ = 65692250720460. Its totient is φ = 5390133392256.

The previous prime is 20213000221319. The next prime is 20213000221361. The reversal of 20213000221320 is 2312200031202.

20213000221320 is a `hidden beast` number, since 2 + 0 + 21 + 300 + 0 + 2 + 21 + 320 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20189079887076 + 23920334244 = 4493226^2 + 154662^2 .

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 = 20213000221293 and 20213000221302.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28073611059 + ... + 28073611778.

Almost surely, 2^{20213000221320} is an apocalyptic number.

20213000221320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20213000221320 is an abundant number, since it is smaller than the sum of its proper divisors (45479250499140).

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

20213000221320 is a wasteful number, since it uses less digits than its factorization.

20213000221320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56147222854 (or 56147222847 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20213000221320 its reverse (2312200031202), we get a palindrome (22525200252522).

The spelling of 20213000221320 in words is "twenty trillion, two hundred thirteen billion, two hundred twenty-one thousand, three hundred twenty".