20430440042 has 8 divisors (see below), whose sum is σ = 32258589600. Its totient is φ = 9677576844.

The previous prime is 20430440039. The next prime is 20430440083. The reversal of 20430440042 is 24004403402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268821542 + ... + 268821617.

It is an arithmetic number, because the mean of its divisors is an integer number (4032323700).

Almost surely, 2^20430440042 is an apocalyptic number.

20430440042 is a deficient number, since it is larger than the sum of its proper divisors (11828149558).

20430440042 is a wasteful number, since it uses less digits than its factorization.

20430440042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537643180.

The product of its (nonzero) digits is 3072, while the sum is 23.

Adding to 20430440042 its reverse (24004403402), we get a palindrome (44434843444).

The spelling of 20430440042 in words is "twenty billion, four hundred thirty million, four hundred forty thousand, forty-two".