202023442100 has 36 divisors (see below), whose sum is σ = 442731395148. Its totient is φ = 80009280000.

The previous prime is 202023442097. The next prime is 202023442163. The reversal of 202023442100 is 1244320202.

It can be written as a sum of positive squares in 6 ways, for example, as 1181434384 + 200842007716 = 34372^2 + 448154^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 9991061 + ... + 10011260.

Almost surely, 2^202023442100 is an apocalyptic number.

202023442100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202023442100 is an abundant number, since it is smaller than the sum of its proper divisors (240707953048).

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

202023442100 is a wasteful number, since it uses less digits than its factorization.

202023442100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20002436 (or 20002429 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 202023442100 its reverse (1244320202), we get a palindrome (203267762302).

The spelling of 202023442100 in words is "two hundred two billion, twenty-three million, four hundred forty-two thousand, one hundred".