21344131230 has 32 divisors (see below), whose sum is σ = 51754024224. Its totient is φ = 5633089536.

The previous prime is 21344131201. The next prime is 21344131273. The reversal of 21344131230 is 3213144312.

It is a happy number.

It is a super-2 number, since 2×21344131230² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21344131230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3664467 + ... + 3670286.

It is an arithmetic number, because the mean of its divisors is an integer number (1617313257).

Almost surely, 2^21344131230 is an apocalyptic number.

21344131230 is an abundant number, since it is smaller than the sum of its proper divisors (30409892994).

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

21344131230 is a wasteful number, since it uses less digits than its factorization.

21344131230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7334860.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21344131230 its reverse (3213144312), we get a palindrome (24557275542).

The spelling of 21344131230 in words is "twenty-one billion, three hundred forty-four million, one hundred thirty-one thousand, two hundred thirty".