21432310044 has 36 divisors (see below), whose sum is σ = 50279273352. Its totient is φ = 7105478240.

The previous prime is 21432310037. The next prime is 21432310103. The reversal of 21432310044 is 44001323412.

It is a junction number, because it is equal to n+sod(n) for n = 21432309996 and 21432310023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7116499 + ... + 7119509.

It is an arithmetic number, because the mean of its divisors is an integer number (1396646482).

Almost surely, 2^21432310044 is an apocalyptic number.

It is an amenable number.

21432310044 is an abundant number, since it is smaller than the sum of its proper divisors (28846963308).

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

21432310044 is an equidigital number, since it uses as much as digits as its factorization.

21432310044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6226 (or 3213 counting only the distinct ones).

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

Adding to 21432310044 its reverse (44001323412), we get a palindrome (65433633456).

The spelling of 21432310044 in words is "twenty-one billion, four hundred thirty-two million, three hundred ten thousand, forty-four".