21144320214 has 64 divisors (see below), whose sum is σ = 46026097344. Its totient is φ = 6450569216.

The previous prime is 21144320203. The next prime is 21144320227. The reversal of 21144320214 is 41202344112.

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, 593572 + ... + 628184.

It is an arithmetic number, because the mean of its divisors is an integer number (719157771).

Almost surely, 2^21144320214 is an apocalyptic number.

21144320214 is an abundant number, since it is smaller than the sum of its proper divisors (24881777130).

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

21144320214 is a wasteful number, since it uses less digits than its factorization.

21144320214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34801.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21144320214 its reverse (41202344112), we get a palindrome (62346664326).

The spelling of 21144320214 in words is "twenty-one billion, one hundred forty-four million, three hundred twenty thousand, two hundred fourteen".