20021200870908 has 12 divisors (see below), whose sum is σ = 46716135365480. Its totient is φ = 6673733623632.

The previous prime is 20021200870907. The next prime is 20021200870927. The reversal of 20021200870908 is 80907800212002.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021200870907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 834216702943 + ... + 834216702966.

Almost surely, 2^{20021200870908} is an apocalyptic number.

It is an amenable number.

20021200870908 is an abundant number, since it is smaller than the sum of its proper divisors (26694934494572).

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

20021200870908 is a wasteful number, since it uses less digits than its factorization.

20021200870908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668433405916 (or 1668433405914 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The spelling of 20021200870908 in words is "twenty trillion, twenty-one billion, two hundred million, eight hundred seventy thousand, nine hundred eight".