20545340342 has 8 divisors (see below), whose sum is σ = 31569669432. Its totient is φ = 10022117200.

The previous prime is 20545340297. The next prime is 20545340351. The reversal of 20545340342 is 24304354502.

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

It is a super-2 number, since 2×20545340342² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20545340299 and 20545340308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125276384 + ... + 125276547.

It is an arithmetic number, because the mean of its divisors is an integer number (3946208679).

Almost surely, 2^20545340342 is an apocalyptic number.

20545340342 is a deficient number, since it is larger than the sum of its proper divisors (11024329090).

20545340342 is a wasteful number, since it uses less digits than its factorization.

20545340342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250552974.

The product of its (nonzero) digits is 57600, while the sum is 32.

Adding to 20545340342 its reverse (24304354502), we get a palindrome (44849694844).

The spelling of 20545340342 in words is "twenty billion, five hundred forty-five million, three hundred forty thousand, three hundred forty-two".