20021802900 has 144 divisors (see below), whose sum is σ = 66522408960. Its totient is φ = 4598294400.

The previous prime is 20021802839. The next prime is 20021802923. The reversal of 20021802900 is 920812002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 96964 + ... + 222363.

Almost surely, 2^20021802900 is an apocalyptic number.

20021802900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021802900 is an abundant number, since it is smaller than the sum of its proper divisors (46500606060).

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

20021802900 is a wasteful number, since it uses less digits than its factorization.

20021802900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319374 (or 319367 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 20021802900 in words is "twenty billion, twenty-one million, eight hundred two thousand, nine hundred".