21354613554662 has 16 divisors (see below), whose sum is σ = 32139099861792. Its totient is φ = 10641631271040.

The previous prime is 21354613554611. The next prime is 21354613554671. The reversal of 21354613554662 is 26645531645312.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11912789 + ... + 13587632.

It is an arithmetic number, because the mean of its divisors is an integer number (2008693741362).

Almost surely, 2^{21354613554662} is an apocalyptic number.

21354613554662 is a deficient number, since it is larger than the sum of its proper divisors (10784486307130).

21354613554662 is a wasteful number, since it uses less digits than its factorization.

21354613554662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25501823.

The product of its digits is 15552000, while the sum is 53.

The spelling of 21354613554662 in words is "twenty-one trillion, three hundred fifty-four billion, six hundred thirteen million, five hundred fifty-four thousand, six hundred sixty-two".