21355352475232 has 24 divisors (see below), whose sum is σ = 42575544496800. Its totient is φ = 10542515777664.

The previous prime is 21355352475167. The next prime is 21355352475239. The reversal of 21355352475232 is 23257425355312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21355352475239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4223761807 + ... + 4223766862.

It is an arithmetic number, because the mean of its divisors is an integer number (1773981020700).

Almost surely, 2^{21355352475232} is an apocalyptic number.

It is an amenable number.

21355352475232 is a deficient number, since it is larger than the sum of its proper divisors (21220192021568).

21355352475232 is an equidigital number, since it uses as much as digits as its factorization.

21355352475232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8447528758 (or 8447528750 counting only the distinct ones).

The product of its digits is 7560000, while the sum is 49.

The spelling of 21355352475232 in words is "twenty-one trillion, three hundred fifty-five billion, three hundred fifty-two million, four hundred seventy-five thousand, two hundred thirty-two".