210002120400018 has 16 divisors (see below), whose sum is σ = 420004724227200. Its totient is φ = 70000626228816.

The previous prime is 210002120399987. The next prime is 210002120400029. The reversal of 210002120400018 is 810004021200012.

It is a junction number, because it is equal to n+sod(n) for n = 210002120399967 and 210002120400003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14368218 + ... + 25028981.

It is an arithmetic number, because the mean of its divisors is an integer number (26250295264200).

Almost surely, 2^{210002120400018} is an apocalyptic number.

210002120400018 is an abundant number, since it is smaller than the sum of its proper divisors (210002603827182).

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

210002120400018 is a wasteful number, since it uses less digits than its factorization.

210002120400018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40285601.

The product of its (nonzero) digits is 256, while the sum is 21.

The spelling of 210002120400018 in words is "two hundred ten trillion, two billion, one hundred twenty million, four hundred thousand, eighteen".