21956546010 has 64 divisors (see below), whose sum is σ = 63766248192. Its totient is φ = 4723424256.

The previous prime is 21956545979. The next prime is 21956546011. The reversal of 21956546010 is 1064565912.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21956546010.

It is not an unprimeable number, because it can be changed into a prime (21956546011) 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 31 ways as a sum of consecutive naturals, for example, 3071577 + ... + 3078716.

It is an arithmetic number, because the mean of its divisors is an integer number (996347628).

Almost surely, 2^21956546010 is an apocalyptic number.

21956546010 is an abundant number, since it is smaller than the sum of its proper divisors (41809702182).

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

21956546010 is a wasteful number, since it uses less digits than its factorization.

21956546010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6150327.

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 21956546010 in words is "twenty-one billion, nine hundred fifty-six million, five hundred forty-six thousand, ten".