421818802402832 has 20 divisors (see below), whose sum is σ = 818690348962236. Its totient is φ = 210543873638400.

The previous prime is 421818802402819. The next prime is 421818802402841. The reversal of 421818802402832 is 238204208818124.

It can be written as a sum of positive squares in 2 ways, for example, as 252985057494016 + 168833744908816 = 15905504^2 + 12993604^2 .

It is a super-2 number, since 2×421818802402832² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22845463169 + ... + 22845481632.

Almost surely, 2^{421818802402832} is an apocalyptic number.

It is an amenable number.

421818802402832 is a deficient number, since it is larger than the sum of its proper divisors (396871546559404).

421818802402832 is a wasteful number, since it uses less digits than its factorization.

421818802402832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45690945386 (or 45690945380 counting only the distinct ones).

The product of its (nonzero) digits is 3145728, while the sum is 53.

The spelling of 421818802402832 in words is "four hundred twenty-one trillion, eight hundred eighteen billion, eight hundred two million, four hundred two thousand, eight hundred thirty-two".