20304430100442 has 32 divisors (see below), whose sum is σ = 45121123652160. Its totient is φ = 6768118185840.

The previous prime is 20304430100393. The next prime is 20304430100459. The reversal of 20304430100442 is 24400103440302.

It is a happy number.

20304430100442 is a `hidden beast` number, since 20 + 30 + 44 + 30 + 100 + 442 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19080813 + ... + 20116815.

It is an arithmetic number, because the mean of its divisors is an integer number (1410035114130).

Almost surely, 2^{20304430100442} is an apocalyptic number.

20304430100442 is an abundant number, since it is smaller than the sum of its proper divisors (24816693551718).

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

20304430100442 is a wasteful number, since it uses less digits than its factorization.

20304430100442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398955 (or 1398949 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 20304430100442 its reverse (24400103440302), we get a palindrome (44704533540744).

The spelling of 20304430100442 in words is "twenty trillion, three hundred four billion, four hundred thirty million, one hundred thousand, four hundred forty-two".