421739680420 has 96 divisors (see below), whose sum is σ = 923369610240. Its totient is φ = 161623226880.

The previous prime is 421739680399. The next prime is 421739680463. The reversal of 421739680420 is 24086937124.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133333759 + ... + 133336921.

It is an arithmetic number, because the mean of its divisors is an integer number (9618433440).

Almost surely, 2^421739680420 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 421739680420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (461684805120).

421739680420 is an abundant number, since it is smaller than the sum of its proper divisors (501629929820).

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

421739680420 is a wasteful number, since it uses less digits than its factorization.

421739680420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5285 (or 5283 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 421739680420 in words is "four hundred twenty-one billion, seven hundred thirty-nine million, six hundred eighty thousand, four hundred twenty".