20403313442 has 4 divisors (see below), whose sum is σ = 30604970166. Its totient is φ = 10201656720.

The previous prime is 20403313439. The next prime is 20403313451. The reversal of 20403313442 is 24431330402.

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., 20397266761 + 6046681 = 142819^2 + 2459^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100828359 + ... + 5100828362.

Almost surely, 2^20403313442 is an apocalyptic number.

20403313442 is a deficient number, since it is larger than the sum of its proper divisors (10201656724).

20403313442 is a wasteful number, since it uses less digits than its factorization.

20403313442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10201656723.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 20403313442 its reverse (24431330402), we get a palindrome (44834643844).

The spelling of 20403313442 in words is "twenty billion, four hundred three million, three hundred thirteen thousand, four hundred forty-two".