21526907016 has 64 divisors (see below), whose sum is σ = 57253279680. Its totient is φ = 6721505280.

The previous prime is 21526906979. The next prime is 21526907027. The reversal of 21526907016 is 61070962512.

It is a super-3 number, since 3×21526907016³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38941 + ... + 211116.

It is an arithmetic number, because the mean of its divisors is an integer number (894582495).

Almost surely, 2^21526907016 is an apocalyptic number.

It is an amenable number.

21526907016 is an abundant number, since it is smaller than the sum of its proper divisors (35726372664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21526907016 is a wasteful number, since it uses less digits than its factorization.

21526907016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250294 (or 250290 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The spelling of 21526907016 in words is "twenty-one billion, five hundred twenty-six million, nine hundred seven thousand, sixteen".