21044132346 has 64 divisors (see below), whose sum is σ = 45471404160. Its totient is φ = 6469017600.

The previous prime is 21044132341. The next prime is 21044132377. The reversal of 21044132346 is 64323144012.

It is not an unprimeable number, because it can be changed into a prime (21044132341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 988765 + ... + 1009823.

It is an arithmetic number, because the mean of its divisors is an integer number (710490690).

Almost surely, 2^21044132346 is an apocalyptic number.

21044132346 is an abundant number, since it is smaller than the sum of its proper divisors (24427271814).

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

21044132346 is a wasteful number, since it uses less digits than its factorization.

21044132346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21279.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 21044132346 its reverse (64323144012), we get a palindrome (85367276358).

The spelling of 21044132346 in words is "twenty-one billion, forty-four million, one hundred thirty-two thousand, three hundred forty-six".