21960834285 has 48 divisors (see below), whose sum is σ = 38348273664. Its totient is φ = 10726200576.

The previous prime is 21960834253. The next prime is 21960834289. The reversal of 21960834285 is 58243806912.

It is not a de Polignac number, because 21960834285 - 2⁵ = 21960834253 is a prime.

It is a super-2 number, since 2×21960834285² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21960834289) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 287839 + ... + 356051.

It is an arithmetic number, because the mean of its divisors is an integer number (798922368).

Almost surely, 2^21960834285 is an apocalyptic number.

It is an amenable number.

21960834285 is a deficient number, since it is larger than the sum of its proper divisors (16387439379).

21960834285 is a wasteful number, since it uses less digits than its factorization.

21960834285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68374 (or 68361 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 21960834285 in words is "twenty-one billion, nine hundred sixty million, eight hundred thirty-four thousand, two hundred eighty-five".