421408018306 has 32 divisors (see below), whose sum is σ = 697425474240. Its totient is φ = 189369523200.

The previous prime is 421408018279. The next prime is 421408018307. The reversal of 421408018306 is 603810804124.

It is a super-2 number, since 2×421408018306² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421408018307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20405746 + ... + 20426386.

It is an arithmetic number, because the mean of its divisors is an integer number (21794546070).

Almost surely, 2^421408018306 is an apocalyptic number.

421408018306 is a deficient number, since it is larger than the sum of its proper divisors (276017455934).

421408018306 is a wasteful number, since it uses less digits than its factorization.

421408018306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31170.

The product of its (nonzero) digits is 36864, while the sum is 37.

The spelling of 421408018306 in words is "four hundred twenty-one billion, four hundred eight million, eighteen thousand, three hundred six".