21001332414 has 16 divisors (see below), whose sum is σ = 42098348160. Its totient is φ = 6984496920.

The previous prime is 21001332367. The next prime is 21001332421. The reversal of 21001332414 is 41423310012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3983952 + ... + 3989219.

It is an arithmetic number, because the mean of its divisors is an integer number (2631146760).

Almost surely, 2^21001332414 is an apocalyptic number.

21001332414 is an abundant number, since it is smaller than the sum of its proper divisors (21097015746).

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

21001332414 is a wasteful number, since it uses less digits than its factorization.

21001332414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7973615.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21001332414 its reverse (41423310012), we get a palindrome (62424642426).

The spelling of 21001332414 in words is "twenty-one billion, one million, three hundred thirty-two thousand, four hundred fourteen".