21163133036605 has 16 divisors (see below), whose sum is σ = 29305509053184. Its totient is φ = 14370970780800.

The previous prime is 21163133036587. The next prime is 21163133036651. The reversal of 21163133036605 is 50663033136112.

It is a happy number.

It is not a de Polignac number, because 21163133036605 - 2¹³ = 21163133028413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2935243696 + ... + 2935250905.

It is an arithmetic number, because the mean of its divisors is an integer number (1831594315824).

Almost surely, 2^{21163133036605} is an apocalyptic number.

It is an amenable number.

21163133036605 is a deficient number, since it is larger than the sum of its proper divisors (8142376016579).

21163133036605 is a wasteful number, since it uses less digits than its factorization.

21163133036605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5870494716.

The product of its (nonzero) digits is 174960, while the sum is 40.

The spelling of 21163133036605 in words is "twenty-one trillion, one hundred sixty-three billion, one hundred thirty-three million, thirty-six thousand, six hundred five".