43263421920 has 240 divisors, whose sum is σ = 152966167200. Its totient is φ = 11515585536.

The previous prime is 43263421897. The next prime is 43263421939. The reversal of 43263421920 is 2912436234.

43263421920 is a `hidden beast` number, since 4 + 3 + 2 + 634 + 2 + 19 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 39 ways as a sum of consecutive naturals, for example, 7760254 + ... + 7765826.

It is an arithmetic number, because the mean of its divisors is an integer number (637359030).

Almost surely, 2^43263421920 is an apocalyptic number.

43263421920 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 43263421920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76483083600).

43263421920 is an abundant number, since it is smaller than the sum of its proper divisors (109702745280).

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

43263421920 is a wasteful number, since it uses less digits than its factorization.

43263421920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6199 (or 6182 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 43263421920 in words is "forty-three billion, two hundred sixty-three million, four hundred twenty-one thousand, nine hundred twenty".