220021020340 has 72 divisors (see below), whose sum is σ = 514824193800. Its totient is φ = 78911585280.

The previous prime is 220021020301. The next prime is 220021020347. The reversal of 220021020340 is 43020120022.

220021020340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1860496 + 220019159844 = 1364^2 + 469062^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021020347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 446065 + ... + 799384.

It is an arithmetic number, because the mean of its divisors is an integer number (7150336025).

Almost surely, 2^220021020340 is an apocalyptic number.

220021020340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220021020340 is an abundant number, since it is smaller than the sum of its proper divisors (294803173460).

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

220021020340 is a wasteful number, since it uses less digits than its factorization.

220021020340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245553 (or 1245540 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 220021020340 its reverse (43020120022), we get a palindrome (263041140362).

The spelling of 220021020340 in words is "two hundred twenty billion, twenty-one million, twenty thousand, three hundred forty".