20873351421784 has 16 divisors (see below), whose sum is σ = 39137961826800. Its totient is φ = 10436561601312.

The previous prime is 20873351421779. The next prime is 20873351421869. The reversal of 20873351421784 is 48712415337802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13483764 + ... + 14951875.

It is an arithmetic number, because the mean of its divisors is an integer number (2446122614175).

Almost surely, 2^{20873351421784} is an apocalyptic number.

It is an amenable number.

20873351421784 is a deficient number, since it is larger than the sum of its proper divisors (18264610405016).

20873351421784 is a wasteful number, since it uses less digits than its factorization.

20873351421784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28527402 (or 28527398 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 55.

The spelling of 20873351421784 in words is "twenty trillion, eight hundred seventy-three billion, three hundred fifty-one million, four hundred twenty-one thousand, seven hundred eighty-four".