21354555140105 has 64 divisors (see below), whose sum is σ = 29629363838976. Its totient is φ = 14622336960000.

The previous prime is 21354555140099. The next prime is 21354555140123. The reversal of 21354555140105 is 50104155545312.

It is not a de Polignac number, because 21354555140105 - 2⁴ = 21354555140089 is a prime.

It is a super-2 number, since 2×21354555140105² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55223180 + ... + 55608530.

It is an arithmetic number, because the mean of its divisors is an integer number (462958809984).

Almost surely, 2^{21354555140105} is an apocalyptic number.

It is an amenable number.

21354555140105 is a deficient number, since it is larger than the sum of its proper divisors (8274808698871).

21354555140105 is a wasteful number, since it uses less digits than its factorization.

21354555140105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386078.

The product of its (nonzero) digits is 300000, while the sum is 41.

The spelling of 21354555140105 in words is "twenty-one trillion, three hundred fifty-four billion, five hundred fifty-five million, one hundred forty thousand, one hundred five".