21016460835 has 24 divisors (see below), whose sum is σ = 37413090000. Its totient is φ = 10905838272.

The previous prime is 21016460833. The next prime is 21016460873. The reversal of 21016460835 is 53806461012.

It is a happy number.

21016460835 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 646 + 0 + 8 + 3 + 5 = 666.

It is not a de Polignac number, because 21016460835 - 2¹ = 21016460833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21016460835.

It is not an unprimeable number, because it can be changed into a prime (21016460833) 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 23 ways as a sum of consecutive naturals, for example, 6309585 + ... + 6312914.

It is an arithmetic number, because the mean of its divisors is an integer number (1558878750).

Almost surely, 2^21016460835 is an apocalyptic number.

21016460835 is a deficient number, since it is larger than the sum of its proper divisors (16396629165).

21016460835 is a wasteful number, since it uses less digits than its factorization.

21016460835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12622547 (or 12622544 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 21016460835 in words is "twenty-one billion, sixteen million, four hundred sixty thousand, eight hundred thirty-five".