21798400214 has 16 divisors (see below), whose sum is σ = 32867681280. Its totient is φ = 10842650280.

The previous prime is 21798400193. The next prime is 21798400223. The reversal of 21798400214 is 41200489712.

It is a happy number.

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, 270947 + ... + 342065.

It is an arithmetic number, because the mean of its divisors is an integer number (2054230080).

Almost surely, 2^21798400214 is an apocalyptic number.

21798400214 is a deficient number, since it is larger than the sum of its proper divisors (11069281066).

21798400214 is a wasteful number, since it uses less digits than its factorization.

21798400214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71915.

The product of its (nonzero) digits is 32256, while the sum is 38.

Adding to 21798400214 its reverse (41200489712), we get a palindrome (62998889926).

The spelling of 21798400214 in words is "twenty-one billion, seven hundred ninety-eight million, four hundred thousand, two hundred fourteen".