43421002000 has 80 divisors (see below), whose sum is σ = 105621489792. Its totient is φ = 17264265600.

The previous prime is 43421001991. The next prime is 43421002007. The reversal of 43421002000 is 20012434.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (43421002007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268999 + ... + 399001.

Almost surely, 2^43421002000 is an apocalyptic number.

43421002000 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 43421002000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52810744896).

43421002000 is an abundant number, since it is smaller than the sum of its proper divisors (62200487792).

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

43421002000 is a wasteful number, since it uses less digits than its factorization.

43421002000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130193 (or 130177 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 43421002000 its reverse (20012434), we get a palindrome (43441014434).

The spelling of 43421002000 in words is "forty-three billion, four hundred twenty-one million, two thousand".