202023400212 has 30 divisors (see below), whose sum is σ = 528129074858. Its totient is φ = 67341133296.

The previous prime is 202023400207. The next prime is 202023400219. The reversal of 202023400212 is 212004320202.

It can be written as a sum of positive squares in only one way, i.e., 149253959556 + 52769440656 = 386334^2 + 229716^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202023400219) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 311764183 + ... + 311764830.

Almost surely, 2^202023400212 is an apocalyptic number.

It is an amenable number.

202023400212 is an abundant number, since it is smaller than the sum of its proper divisors (326105674646).

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

202023400212 is a wasteful number, since it uses less digits than its factorization.

202023400212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623529029 (or 623529018 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 202023400212 its reverse (212004320202), we get a palindrome (414027720414).

The spelling of 202023400212 in words is "two hundred two billion, twenty-three million, four hundred thousand, two hundred twelve".