20394844892688 has 80 divisors (see below), whose sum is σ = 60889906189440. Its totient is φ = 5761625515008.

The previous prime is 20394844892683. The next prime is 20394844892693. The reversal of 20394844892688 is 88629844849302.

It is an interprime number because it is at equal distance from previous prime (20394844892683) and next prime (20394844892693).

It is not an unprimeable number, because it can be changed into a prime (20394844892683) by changing a digit.

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, 340975395 + ... + 341035202.

It is an arithmetic number, because the mean of its divisors is an integer number (761123827368).

Almost surely, 2^{20394844892688} is an apocalyptic number.

20394844892688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20394844892688 is an abundant number, since it is smaller than the sum of its proper divisors (40495061296752).

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

20394844892688 is a wasteful number, since it uses less digits than its factorization.

20394844892688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682010704 (or 682010698 counting only the distinct ones).

The product of its (nonzero) digits is 1528823808, while the sum is 75.

The spelling of 20394844892688 in words is "twenty trillion, three hundred ninety-four billion, eight hundred forty-four million, eight hundred ninety-two thousand, six hundred eighty-eight".