420206540423210 has 16 divisors (see below), whose sum is σ = 764169419905416. Its totient is φ = 166349805692928.

The previous prime is 420206540423143. The next prime is 420206540423231. The reversal of 420206540423210 is 12324045602024.

It can be written as a sum of positive squares in 4 ways, for example, as 303519080396401 + 116687460026809 = 17421799^2 + 10802197^2 .

It is a super-2 number, since 2×420206540423210² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216601308527 + ... + 216601310466.

Almost surely, 2^{420206540423210} is an apocalyptic number.

420206540423210 is a deficient number, since it is larger than the sum of its proper divisors (343962879482206).

420206540423210 is a wasteful number, since it uses less digits than its factorization.

420206540423210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433202619097.

The product of its (nonzero) digits is 92160, while the sum is 35.

The spelling of 420206540423210 in words is "four hundred twenty trillion, two hundred six billion, five hundred forty million, four hundred twenty-three thousand, two hundred ten".