20970994045890 has 32 divisors (see below), whose sum is σ = 57520440812160. Its totient is φ = 4793370067584.

The previous prime is 20970994045823. The next prime is 20970994045949. The reversal of 20970994045890 is 9854049907902.

It is a Curzon number.

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, 49930937995 + ... + 49930938414.

It is an arithmetic number, because the mean of its divisors is an integer number (1797513775380).

Almost surely, 2^{20970994045890} is an apocalyptic number.

20970994045890 is an abundant number, since it is smaller than the sum of its proper divisors (36549446766270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20970994045890 is a wasteful number, since it uses less digits than its factorization.

20970994045890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99861876426.

The product of its (nonzero) digits is 58786560, while the sum is 66.

The spelling of 20970994045890 in words is "twenty trillion, nine hundred seventy billion, nine hundred ninety-four million, forty-five thousand, eight hundred ninety".