20873555480 has 16 divisors (see below), whose sum is σ = 46965499920. Its totient is φ = 8349422176.

The previous prime is 20873555471. The next prime is 20873555579. The reversal of 20873555480 is 8455537802.

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, 260919404 + ... + 260919483.

It is an arithmetic number, because the mean of its divisors is an integer number (2935343745).

Almost surely, 2^20873555480 is an apocalyptic number.

20873555480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20873555480 is an abundant number, since it is smaller than the sum of its proper divisors (26091944440).

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

20873555480 is a wasteful number, since it uses less digits than its factorization.

20873555480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521838898 (or 521838894 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 47.

The spelling of 20873555480 in words is "twenty billion, eight hundred seventy-three million, five hundred fifty-five thousand, four hundred eighty".