21420054205230 has 32 divisors (see below), whose sum is σ = 51410972094624. Its totient is φ = 5711698676736.

The previous prime is 21420054205223. The next prime is 21420054205267. The reversal of 21420054205230 is 3250245002412.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 19184167 + ... + 20269986.

It is an arithmetic number, because the mean of its divisors is an integer number (1606592877957).

Almost surely, 2^{21420054205230} is an apocalyptic number.

21420054205230 is an abundant number, since it is smaller than the sum of its proper divisors (29990917889394).

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

21420054205230 is a wasteful number, since it uses less digits than its factorization.

21420054205230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39472260.

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 21420054205230 its reverse (3250245002412), we get a palindrome (24670299207642).

The spelling of 21420054205230 in words is "twenty-one trillion, four hundred twenty billion, fifty-four million, two hundred five thousand, two hundred thirty".