20673655420 has 48 divisors (see below), whose sum is σ = 47408457600. Its totient is φ = 7510233920.

The previous prime is 20673655397. The next prime is 20673655447. The reversal of 20673655420 is 2455637602.

It is a congruent 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, 178071 + ... + 270289.

It is an arithmetic number, because the mean of its divisors is an integer number (987676200).

Almost surely, 2^20673655420 is an apocalyptic number.

20673655420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20673655420 is an abundant number, since it is smaller than the sum of its proper divisors (26734802180).

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

20673655420 is a wasteful number, since it uses less digits than its factorization.

20673655420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93258 (or 93256 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 40.

The spelling of 20673655420 in words is "twenty billion, six hundred seventy-three million, six hundred fifty-five thousand, four hundred twenty".