20673856700 has 108 divisors (see below), whose sum is σ = 51695555856. Its totient is φ = 7029984000.

The previous prime is 20673856681. The next prime is 20673856717. The reversal of 20673856700 is 765837602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12011840 + ... + 12013560.

Almost surely, 2^20673856700 is an apocalyptic number.

20673856700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20673856700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25847777928).

20673856700 is an abundant number, since it is smaller than the sum of its proper divisors (31021699156).

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

20673856700 is a wasteful number, since it uses less digits than its factorization.

20673856700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004 (or 1866 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 20673856700 in words is "twenty billion, six hundred seventy-three million, eight hundred fifty-six thousand, seven hundred".