20305443342 has 24 divisors (see below), whose sum is σ = 41738159736. Its totient is φ = 6585546528.

The previous prime is 20305443313. The next prime is 20305443383. The reversal of 20305443342 is 24334450302.

It is a super-2 number, since 2×20305443342² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1227813 + ... + 1244240.

It is an arithmetic number, because the mean of its divisors is an integer number (1739089989).

Almost surely, 2^20305443342 is an apocalyptic number.

20305443342 is an abundant number, since it is smaller than the sum of its proper divisors (21432716394).

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

20305443342 is a wasteful number, since it uses less digits than its factorization.

20305443342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472132 (or 2472095 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 30.

Adding to 20305443342 its reverse (24334450302), we get a palindrome (44639893644).

The spelling of 20305443342 in words is "twenty billion, three hundred five million, four hundred forty-three thousand, three hundred forty-two".