21164776141 has 8 divisors (see below), whose sum is σ = 21285403200. Its totient is φ = 21044292192.

The previous prime is 21164776133. The next prime is 21164776151. The reversal of 21164776141 is 14167746112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21164776141 - 2³ = 21164776133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21164776094 and 21164776103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21164776151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268161 + ... + 337993.

It is an arithmetic number, because the mean of its divisors is an integer number (2660675400).

Almost surely, 2^21164776141 is an apocalyptic number.

It is an amenable number.

21164776141 is a deficient number, since it is larger than the sum of its proper divisors (120627059).

21164776141 is a wasteful number, since it uses less digits than its factorization.

21164776141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71555.

The product of its digits is 56448, while the sum is 40.

The spelling of 21164776141 in words is "twenty-one billion, one hundred sixty-four million, seven hundred seventy-six thousand, one hundred forty-one".