21214054230 has 128 divisors (see below), whose sum is σ = 55897067520. Its totient is φ = 5132574720.

The previous prime is 21214054193. The next prime is 21214054273. The reversal of 21214054230 is 3245041212.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21214054230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1707802 + ... + 1720178.

It is an arithmetic number, because the mean of its divisors is an integer number (436695840).

Almost surely, 2^21214054230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21214054230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27948533760).

21214054230 is an abundant number, since it is smaller than the sum of its proper divisors (34683013290).

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

21214054230 is a wasteful number, since it uses less digits than its factorization.

21214054230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12534.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 21214054230 its reverse (3245041212), we get a palindrome (24459095442).

The spelling of 21214054230 in words is "twenty-one billion, two hundred fourteen million, fifty-four thousand, two hundred thirty".