200378021436 has 72 divisors (see below), whose sum is σ = 508637773280. Its totient is φ = 66512669184.

The previous prime is 200378021413. The next prime is 200378021453. The reversal of 200378021436 is 634120873002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 200378021436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11969520 + ... + 11986248.

Almost surely, 2^200378021436 is an apocalyptic number.

It is an amenable number.

200378021436 is an abundant number, since it is smaller than the sum of its proper divisors (308259751844).

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

200378021436 is a wasteful number, since it uses less digits than its factorization.

200378021436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18115 (or 18110 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

Adding to 200378021436 its reverse (634120873002), we get a palindrome (834498894438).

The spelling of 200378021436 in words is "two hundred billion, three hundred seventy-eight million, twenty-one thousand, four hundred thirty-six".