21253421522350 has 12 divisors (see below), whose sum is σ = 39531364031664. Its totient is φ = 8501368608920.

The previous prime is 21253421522339. The next prime is 21253421522393. The reversal of 21253421522350 is 5322512435212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 212534215174 + ... + 212534215273.

It is an arithmetic number, because the mean of its divisors is an integer number (3294280335972).

Almost surely, 2^{21253421522350} is an apocalyptic number.

21253421522350 is a deficient number, since it is larger than the sum of its proper divisors (18277942509314).

21253421522350 is a wasteful number, since it uses less digits than its factorization.

21253421522350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425068430459 (or 425068430454 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 21253421522350 its reverse (5322512435212), we get a palindrome (26575933957562).

The spelling of 21253421522350 in words is "twenty-one trillion, two hundred fifty-three billion, four hundred twenty-one million, five hundred twenty-two thousand, three hundred fifty".