20304705142 has 8 divisors (see below), whose sum is σ = 30522277656. Its totient is φ = 10130612592.

The previous prime is 20304705103. The next prime is 20304705143. The reversal of 20304705142 is 24150740302.

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

It is a super-2 number, since 2×20304705142² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20304705142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20304705143) 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 in 3 ways as a sum of consecutive naturals, for example, 10868823 + ... + 10870690.

It is an arithmetic number, because the mean of its divisors is an integer number (3815284707).

Almost surely, 2^20304705142 is an apocalyptic number.

20304705142 is a deficient number, since it is larger than the sum of its proper divisors (10217572514).

20304705142 is a wasteful number, since it uses less digits than its factorization.

20304705142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21739982.

The product of its (nonzero) digits is 6720, while the sum is 28.

The spelling of 20304705142 in words is "twenty billion, three hundred four million, seven hundred five thousand, one hundred forty-two".