20202255100 has 18 divisors (see below), whose sum is σ = 43838893784. Its totient is φ = 8080902000.

The previous prime is 20202255083. The next prime is 20202255109. The reversal of 20202255100 is 155220202.

It is a super-2 number, since 2×20202255100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202255109) 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 5 ways as a sum of consecutive naturals, for example, 101011176 + ... + 101011375.

Almost surely, 2^20202255100 is an apocalyptic number.

20202255100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20202255100 is an abundant number, since it is smaller than the sum of its proper divisors (23636638684).

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

20202255100 is a wasteful number, since it uses less digits than its factorization.

20202255100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202022565 (or 202022558 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

Adding to 20202255100 its reverse (155220202), we get a palindrome (20357475302).

The spelling of 20202255100 in words is "twenty billion, two hundred two million, two hundred fifty-five thousand, one hundred".