20846689346890 has 32 divisors (see below), whose sum is σ = 40983083279424. Its totient is φ = 7571768749440.

The previous prime is 20846689346843. The next prime is 20846689346897. The reversal of 20846689346890 is 9864398664802.

It is not an unprimeable number, because it can be changed into a prime (20846689346897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110474784 + ... + 110663323.

It is an arithmetic number, because the mean of its divisors is an integer number (1280721352482).

Almost surely, 2^{20846689346890} is an apocalyptic number.

20846689346890 is a deficient number, since it is larger than the sum of its proper divisors (20136393932534).

20846689346890 is a wasteful number, since it uses less digits than its factorization.

20846689346890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221138982.

The product of its (nonzero) digits is 859963392, while the sum is 73.

The spelling of 20846689346890 in words is "twenty trillion, eight hundred forty-six billion, six hundred eighty-nine million, three hundred forty-six thousand, eight hundred ninety".