4230971521920 has 4608 divisors, whose sum is σ = 20532865167360. Its totient is φ = 816965222400.

The previous prime is 4230971521879. The next prime is 4230971521969. The reversal of 4230971521920 is 291251790324.

4230971521920 is a `hidden beast` number, since 4 + 2 + 30 + 9 + 7 + 1 + 521 + 92 + 0 = 666.

It is a super-2 number, since 2×4230971521920² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 136482952305 + ... + 136482952335.

It is an arithmetic number, because the mean of its divisors is an integer number (4455916920).

Almost surely, 2^{4230971521920} is an apocalyptic number.

4230971521920 is a gapful number since it is divisible by the number (40) 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 4230971521920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10266432583680).

4230971521920 is an abundant number, since it is smaller than the sum of its proper divisors (16301893645440).

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

4230971521920 is a wasteful number, since it uses less digits than its factorization.

4230971521920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 4230971521920 in words is "four trillion, two hundred thirty billion, nine hundred seventy-one million, five hundred twenty-one thousand, nine hundred twenty".