21432301044 has 96 divisors (see below), whose sum is σ = 62722308096. Its totient is φ = 5533457280.

The previous prime is 21432301039. The next prime is 21432301061. The reversal of 21432301044 is 44010323412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84862 + ... + 223754.

It is an arithmetic number, because the mean of its divisors is an integer number (653357376).

Almost surely, 2^21432301044 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 21432301044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31361154048).

21432301044 is an abundant number, since it is smaller than the sum of its proper divisors (41290007052).

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

21432301044 is a wasteful number, since it uses less digits than its factorization.

21432301044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139085 (or 139083 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21432301044 its reverse (44010323412), we get a palindrome (65442624456).

The spelling of 21432301044 in words is "twenty-one billion, four hundred thirty-two million, three hundred one thousand, forty-four".