43401132020 has 48 divisors (see below), whose sum is σ = 95264467200. Its totient is φ = 16577822976.

The previous prime is 43401131959. The next prime is 43401132031. The reversal of 43401132020 is 2023110434.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 43401131983 and 43401132001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196784 + ... + 354296.

It is an arithmetic number, because the mean of its divisors is an integer number (1984676400).

Almost surely, 2^43401132020 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 43401132020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47632233600).

43401132020 is an abundant number, since it is smaller than the sum of its proper divisors (51863335180).

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

43401132020 is a wasteful number, since it uses less digits than its factorization.

43401132020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158144 (or 158142 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 43401132020 its reverse (2023110434), we get a palindrome (45424242454).

The spelling of 43401132020 in words is "forty-three billion, four hundred one million, one hundred thirty-two thousand, twenty".