20340345616 has 80 divisors (see below), whose sum is σ = 40564260864. Its totient is φ = 9877456512.

The previous prime is 20340345587. The next prime is 20340345637. The reversal of 20340345616 is 61654304302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43931401 + ... + 43931863.

Almost surely, 2^20340345616 is an apocalyptic number.

It is an amenable number.

20340345616 is a deficient number, since it is larger than the sum of its proper divisors (20223915248).

20340345616 is a wasteful number, since it uses less digits than its factorization.

20340345616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028 (or 1022 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

Adding to 20340345616 its reverse (61654304302), we get a palindrome (81994649918).

The spelling of 20340345616 in words is "twenty billion, three hundred forty million, three hundred forty-five thousand, six hundred sixteen".