20000200000021 has 8 divisors (see below), whose sum is σ = 20002667327064. Its totient is φ = 19997732858880.

The previous prime is 20000199999971. The next prime is 20000200000103. The reversal of 20000200000021 is 12000000200002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11112795619396 + 8887404380625 = 3333586^2 + 2981175^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20000200000021 - 2¹³ = 20000199991829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000200001021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368348151 + ... + 368402443.

It is an arithmetic number, because the mean of its divisors is an integer number (2500333415883).

Almost surely, 2^{20000200000021} is an apocalyptic number.

It is an amenable number.

20000200000021 is a deficient number, since it is larger than the sum of its proper divisors (2467327043).

20000200000021 is a wasteful number, since it uses less digits than its factorization.

20000200000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92951.

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

Adding to 20000200000021 its reverse (12000000200002), we get a palindrome (32000200200023).

The spelling of 20000200000021 in words is "twenty trillion, two hundred million, twenty-one", and thus it is an aban number.