3251421820020 has 384 divisors, whose sum is σ = 11001583337472. Its totient is φ = 708359372800.

The previous prime is 3251421820019. The next prime is 3251421820021. The reversal of 3251421820020 is 200281241523.

It is an interprime number because it is at equal distance from previous prime (3251421820019) and next prime (3251421820021).

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

It is a self number, because there is not a number n which added to its sum of digits gives 3251421820020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3251421820021) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 21545749 + ... + 21696131.

It is an arithmetic number, because the mean of its divisors is an integer number (28649956608).

Almost surely, 2^{3251421820020} is an apocalyptic number.

3251421820020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3251421820020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5500791668736).

3251421820020 is an abundant number, since it is smaller than the sum of its proper divisors (7750161517452).

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

3251421820020 is a wasteful number, since it uses less digits than its factorization.

3251421820020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150511 (or 150509 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The spelling of 3251421820020 in words is "three trillion, two hundred fifty-one billion, four hundred twenty-one million, eight hundred twenty thousand, twenty".