20206900 has 36 divisors (see below), whose sum is σ = 50114848. Its totient is φ = 6927840.

The previous prime is 20206889. The next prime is 20206909. The reversal of 20206900 is 960202.

It is a super-2 number, since 2×20206900² = 816637615220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20206909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13734 + ... + 15133.

Almost surely, 2^20206900 is an apocalyptic number.

20206900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20206900 is an abundant number, since it is smaller than the sum of its proper divisors (29907948).

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

20206900 is a wasteful number, since it uses less digits than its factorization.

20206900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28888 (or 28881 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 20206900 is about 4495.2085602339. The cubic root of 20206900 is about 272.3745740430.

The spelling of 20206900 in words is "twenty million, two hundred six thousand, nine hundred".