20202222555 has 80 divisors (see below), whose sum is σ = 37314645984. Its totient is φ = 10449077760.

The previous prime is 20202222517. The next prime is 20202222559. The reversal of 20202222555 is 55522220202.

It is not a de Polignac number, because 20202222555 - 2⁷ = 20202222427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20202222559) 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 79 ways as a sum of consecutive naturals, for example, 4957999 + ... + 4962071.

Almost surely, 2^20202222555 is an apocalyptic number.

20202222555 is a deficient number, since it is larger than the sum of its proper divisors (17112423429).

20202222555 is a wasteful number, since it uses less digits than its factorization.

20202222555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4458 (or 4449 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

Adding to 20202222555 its reverse (55522220202), we get a palindrome (75724442757).

The spelling of 20202222555 in words is "twenty billion, two hundred two million, two hundred twenty-two thousand, five hundred fifty-five".