21653040045350 has 48 divisors (see below), whose sum is σ = 46031378588928. Its totient is φ = 7423382987040.

The previous prime is 21653040045349. The next prime is 21653040045449. The reversal of 21653040045350 is 5354004035612.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2903357 + ... + 7192743.

It is an arithmetic number, because the mean of its divisors is an integer number (958987053936).

Almost surely, 2^{21653040045350} is an apocalyptic number.

21653040045350 is an abundant number, since it is smaller than the sum of its proper divisors (24378338543578).

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

21653040045350 is a wasteful number, since it uses less digits than its factorization.

21653040045350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4303829 (or 4303824 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 38.

The spelling of 21653040045350 in words is "twenty-one trillion, six hundred fifty-three billion, forty million, forty-five thousand, three hundred fifty".