420808288021 has 8 divisors (see below), whose sum is σ = 470260260288. Its totient is φ = 373222428000.

The previous prime is 420808287997. The next prime is 420808288037. The reversal of 420808288021 is 120882808024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420808288021 - 2²⁷ = 420674070293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420808288421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466527585 + ... + 466528486.

It is an arithmetic number, because the mean of its divisors is an integer number (58782532536).

Almost surely, 2^420808288021 is an apocalyptic number.

420808288021 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

420808288021 is a deficient number, since it is larger than the sum of its proper divisors (49451972267).

420808288021 is a wasteful number, since it uses less digits than its factorization.

420808288021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933056123.

The product of its (nonzero) digits is 131072, while the sum is 43.

The spelling of 420808288021 in words is "four hundred twenty billion, eight hundred eight million, two hundred eighty-eight thousand, twenty-one".