20400310202 has 4 divisors (see below), whose sum is σ = 30600465306. Its totient is φ = 10200155100.

The previous prime is 20400310163. The next prime is 20400310219. The reversal of 20400310202 is 20201300402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11937966121 + 8462344081 = 109261^2 + 91991^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100077549 + ... + 5100077552.

Almost surely, 2^20400310202 is an apocalyptic number.

20400310202 is a deficient number, since it is larger than the sum of its proper divisors (10200155104).

20400310202 is a wasteful number, since it uses less digits than its factorization.

20400310202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10200155103.

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 20400310202 its reverse (20201300402), we get a palindrome (40601610604).

The spelling of 20400310202 in words is "twenty billion, four hundred million, three hundred ten thousand, two hundred two".