21253230205134 has 8 divisors (see below), whose sum is σ = 42506460410280. Its totient is φ = 7084410068376.

The previous prime is 21253230205127. The next prime is 21253230205153. The reversal of 21253230205134 is 43150203235212.

It is a sphenic number, since it is the product of 3 distinct primes.

21253230205134 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21253230205095 and 21253230205104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1771102517089 + ... + 1771102517100.

It is an arithmetic number, because the mean of its divisors is an integer number (5313307551285).

Almost surely, 2^{21253230205134} is an apocalyptic number.

21253230205134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21253230205134 is a wasteful number, since it uses less digits than its factorization.

21253230205134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3542205034194.

The product of its (nonzero) digits is 43200, while the sum is 33.

The spelling of 21253230205134 in words is "twenty-one trillion, two hundred fifty-three billion, two hundred thirty million, two hundred five thousand, one hundred thirty-four".