20798900 has 36 divisors (see below), whose sum is σ = 47101152. Its totient is φ = 7956960.

The previous prime is 20798881. The next prime is 20798927. The reversal of 20798900 is 989702.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2222 + ... + 6821.

Almost surely, 2^20798900 is an apocalyptic number.

20798900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20798900 is an abundant number, since it is smaller than the sum of its proper divisors (26302252).

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

20798900 is a wasteful number, since it uses less digits than its factorization.

20798900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9080 (or 9073 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 20798900 is about 4560.5811033244. The cubic root of 20798900 is about 275.0089253302.

The spelling of 20798900 in words is "twenty million, seven hundred ninety-eight thousand, nine hundred".