20204402402 has 4 divisors (see below), whose sum is σ = 30306603606. Its totient is φ = 10102201200.

The previous prime is 20204402401. The next prime is 20204402429. The reversal of 20204402402 is 20420440202.

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., 17384686201 + 2819716201 = 131851^2 + 53101^2 .

It is not an unprimeable number, because it can be changed into a prime (20204402401) by changing a digit.

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 as a sum of consecutive naturals, namely, 5051100599 + ... + 5051100602.

Almost surely, 2^20204402402 is an apocalyptic number.

20204402402 is a deficient number, since it is larger than the sum of its proper divisors (10102201204).

20204402402 is a wasteful number, since it uses less digits than its factorization.

20204402402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10102201203.

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 20204402402 its reverse (20420440202), we get a palindrome (40624842604).

The spelling of 20204402402 in words is "twenty billion, two hundred four million, four hundred two thousand, four hundred two".