20873428121020 has 12 divisors (see below), whose sum is σ = 43834199054184. Its totient is φ = 8349371248400.

The previous prime is 20873428121009. The next prime is 20873428121053. The reversal of 20873428121020 is 2012182437802.

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, 521835703006 + ... + 521835703045.

It is an arithmetic number, because the mean of its divisors is an integer number (3652849921182).

Almost surely, 2^{20873428121020} is an apocalyptic number.

20873428121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20873428121020 is an abundant number, since it is smaller than the sum of its proper divisors (22960770933164).

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

20873428121020 is a wasteful number, since it uses less digits than its factorization.

20873428121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043671406060 (or 1043671406058 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The spelling of 20873428121020 in words is "twenty trillion, eight hundred seventy-three billion, four hundred twenty-eight million, one hundred twenty-one thousand, twenty".