21941285355 has 24 divisors (see below), whose sum is σ = 41488976880. Its totient is φ = 10638198720.

The previous prime is 21941285323. The next prime is 21941285389. The reversal of 21941285355 is 55358214912.

21941285355 is a `hidden beast` number, since 2 + 1 + 94 + 1 + 28 + 535 + 5 = 666.

It is not a de Polignac number, because 21941285355 - 2⁵ = 21941285323 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 21941285355.

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, 22162420 + ... + 22163409.

It is an arithmetic number, because the mean of its divisors is an integer number (1728707370).

Almost surely, 2^21941285355 is an apocalyptic number.

21941285355 is a deficient number, since it is larger than the sum of its proper divisors (19547691525).

21941285355 is a wasteful number, since it uses less digits than its factorization.

21941285355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44325851 (or 44325848 counting only the distinct ones).

The product of its digits is 432000, while the sum is 45.

The spelling of 21941285355 in words is "twenty-one billion, nine hundred forty-one million, two hundred eighty-five thousand, three hundred fifty-five".