200421312434 has 12 divisors (see below), whose sum is σ = 349714739214. Its totient is φ = 85894848144.

The previous prime is 200421312397. The next prime is 200421312449. The reversal of 200421312434 is 434213124002.

It can be written as a sum of positive squares in only one way, i.e., 190055018209 + 10366294225 = 435953^2 + 101815^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1022557619 + ... + 1022557814.

Almost surely, 2^200421312434 is an apocalyptic number.

200421312434 is a deficient number, since it is larger than the sum of its proper divisors (149293426780).

200421312434 is a wasteful number, since it uses less digits than its factorization.

200421312434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045115449 (or 2045115442 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 200421312434 its reverse (434213124002), we get a palindrome (634634436436).

The spelling of 200421312434 in words is "two hundred billion, four hundred twenty-one million, three hundred twelve thousand, four hundred thirty-four".