2000018200021 has 8 divisors (see below), whose sum is σ = 2117703521304. Its totient is φ = 1882337011200.

The previous prime is 2000018199941. The next prime is 2000018200049. The reversal of 2000018200021 is 1200028100002.

It can be written as a sum of positive squares in 4 ways, for example, as 939707278225 + 1060310921796 = 969385^2 + 1029714^2 .

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 2000018200021 - 2²³ = 2000009811413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2000018199968 and 2000018200004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000018200121) 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, 7590 + ... + 2000023.

It is an arithmetic number, because the mean of its divisors is an integer number (264712940163).

Almost surely, 2^{2000018200021} is an apocalyptic number.

It is an amenable number.

2000018200021 is a deficient number, since it is larger than the sum of its proper divisors (117685321283).

2000018200021 is a wasteful number, since it uses less digits than its factorization.

2000018200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066231.

The product of its (nonzero) digits is 64, while the sum is 16.

The spelling of 2000018200021 in words is "two trillion, eighteen million, two hundred thousand, twenty-one".