421701652020 has 144 divisors (see below), whose sum is σ = 1298530497600. Its totient is φ = 102178306560.

The previous prime is 421701651997. The next prime is 421701652037. The reversal of 421701652020 is 20256107124.

421701652020 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15224904 + ... + 15252576.

It is an arithmetic number, because the mean of its divisors is an integer number (9017572900).

Almost surely, 2^421701652020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421701652020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (649265248800).

421701652020 is an abundant number, since it is smaller than the sum of its proper divisors (876828845580).

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

421701652020 is a wasteful number, since it uses less digits than its factorization.

421701652020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29806 (or 29793 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

Adding to 421701652020 its reverse (20256107124), we get a palindrome (441957759144).

The spelling of 421701652020 in words is "four hundred twenty-one billion, seven hundred one million, six hundred fifty-two thousand, twenty".