21916530370 has 64 divisors (see below), whose sum is σ = 46171296000. Its totient is φ = 7487168640.

The previous prime is 21916530359. The next prime is 21916530371. The reversal of 21916530370 is 7303561912.

It is not an unprimeable number, because it can be changed into a prime (21916530371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 952461 + ... + 975199.

It is an arithmetic number, because the mean of its divisors is an integer number (721426500).

Almost surely, 2^21916530370 is an apocalyptic number.

21916530370 is an abundant number, since it is smaller than the sum of its proper divisors (24254765630).

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

21916530370 is a wasteful number, since it uses less digits than its factorization.

21916530370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23048 (or 23034 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 37.

The spelling of 21916530370 in words is "twenty-one billion, nine hundred sixteen million, five hundred thirty thousand, three hundred seventy".