20220555601 has 9 divisors (see below), whose sum is σ = 20616958299. Its totient is φ = 19831641336.

The previous prime is 20220555583. The next prime is 20220555653. The reversal of 20220555601 is 10655502202.

The square root of 20220555601 is 142199.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 14576940225 + 5643615376 = 120735^2 + 75124^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20220555601 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20220555601.

It is not an unprimeable number, because it can be changed into a prime (20220555001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7535206 + ... + 7537888.

Almost surely, 2^20220555601 is an apocalyptic number.

20220555601 is the 142199-th square number.

20220555601 is the 71100-th centered octagonal number.

It is an amenable number.

20220555601 is a deficient number, since it is larger than the sum of its proper divisors (396402698).

20220555601 is an frugal number, since it uses more digits than its factorization.

20220555601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5472 (or 2736 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 20220555601 in words is "twenty billion, two hundred twenty million, five hundred fifty-five thousand, six hundred one".