20646606246442 has 32 divisors (see below), whose sum is σ = 35737219647360. Its totient is φ = 8853815646720.

The previous prime is 20646606246433. The next prime is 20646606246491. The reversal of 20646606246442 is 24464260664602.

It is a self number, because there is not a number n which added to its sum of digits gives 20646606246442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279439567 + ... + 279513442.

It is an arithmetic number, because the mean of its divisors is an integer number (1116788113980).

Almost surely, 2^{20646606246442} is an apocalyptic number.

20646606246442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20646606246442 is a deficient number, since it is larger than the sum of its proper divisors (15090613400918).

20646606246442 is a wasteful number, since it uses less digits than its factorization.

20646606246442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558953118.

The product of its (nonzero) digits is 15925248, while the sum is 52.

The spelling of 20646606246442 in words is "twenty trillion, six hundred forty-six billion, six hundred six million, two hundred forty-six thousand, four hundred forty-two".