2021002220018 has 16 divisors (see below), whose sum is σ = 3039871835520. Its totient is φ = 1007715450000.

The previous prime is 2021002220011. The next prime is 2021002220023. The reversal of 2021002220018 is 8100222001202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2021002220011) 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, 93173 + ... + 2012631.

It is an arithmetic number, because the mean of its divisors is an integer number (189991989720).

Almost surely, 2^{2021002220018} is an apocalyptic number.

2021002220018 is a deficient number, since it is larger than the sum of its proper divisors (1018869615502).

2021002220018 is a wasteful number, since it uses less digits than its factorization.

2021002220018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920913.

The product of its (nonzero) digits is 256, while the sum is 20.

The spelling of 2021002220018 in words is "two trillion, twenty-one billion, two million, two hundred twenty thousand, eighteen".