20343420342 has 24 divisors (see below), whose sum is σ = 50374184016. Its totient is φ = 5812405776.

The previous prime is 20343420329. The next prime is 20343420353. The reversal of 20343420342 is 24302434302.

20343420342 is a `hidden beast` number, since 20 + 3 + 434 + 203 + 4 + 2 = 666.

It is a super-2 number, since 2×20343420342² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80727733 + ... + 80727984.

It is an arithmetic number, because the mean of its divisors is an integer number (2098924334).

Almost surely, 2^20343420342 is an apocalyptic number.

20343420342 is an abundant number, since it is smaller than the sum of its proper divisors (30030763674).

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

20343420342 is a wasteful number, since it uses less digits than its factorization.

20343420342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161455732 (or 161455729 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 20343420342 its reverse (24302434302), we get a palindrome (44645854644).

The spelling of 20343420342 in words is "twenty billion, three hundred forty-three million, four hundred twenty thousand, three hundred forty-two".