20672990860 has 24 divisors (see below), whose sum is σ = 43619039856. Its totient is φ = 8230004160.

The previous prime is 20672990827. The next prime is 20672990881. The reversal of 20672990860 is 6809927602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2445187 + ... + 2453626.

It is an arithmetic number, because the mean of its divisors is an integer number (1817459994).

Almost surely, 2^20672990860 is an apocalyptic number.

20672990860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20672990860 is an abundant number, since it is smaller than the sum of its proper divisors (22946048996).

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

20672990860 is a wasteful number, since it uses less digits than its factorization.

20672990860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4899033 (or 4899031 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 20672990860 in words is "twenty billion, six hundred seventy-two million, nine hundred ninety thousand, eight hundred sixty".