20000021020000 has 120 divisors (see below), whose sum is σ = 56232059493456. Its totient is φ = 6857150016000.

The previous prime is 20000021019943. The next prime is 20000021020027. The reversal of 20000021020000 is 2012000002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 71288647 + ... + 71568646.

Almost surely, 2^{20000021020000} is an apocalyptic number.

20000021020000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20000021020000 is an abundant number, since it is smaller than the sum of its proper divisors (36232038473456).

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

20000021020000 is an equidigital number, since it uses as much as digits as its factorization.

20000021020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142857330 (or 142857307 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

Adding to 20000021020000 its reverse (2012000002), we get a palindrome (20002033020002).

The spelling of 20000021020000 in words is "twenty trillion, twenty-one million, twenty thousand".