20346640542212 has 6 divisors (see below), whose sum is σ = 35606620948878. Its totient is φ = 10173320271104.

The previous prime is 20346640542203. The next prime is 20346640542271. The reversal of 20346640542212 is 21224504664302.

It can be written as a sum of positive squares in only one way, i.e., 14210834115076 + 6135806427136 = 3769726^2 + 2477056^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20346640542212.

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 as a sum of consecutive naturals, namely, 2543330067773 + ... + 2543330067780.

It is an arithmetic number, because the mean of its divisors is an integer number (5934436824813).

Almost surely, 2^{20346640542212} is an apocalyptic number.

It is an amenable number.

20346640542212 is a deficient number, since it is larger than the sum of its proper divisors (15259980406666).

20346640542212 is a wasteful number, since it uses less digits than its factorization.

20346640542212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086660135557 (or 5086660135555 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 41.

The spelling of 20346640542212 in words is "twenty trillion, three hundred forty-six billion, six hundred forty million, five hundred forty-two thousand, two hundred twelve".