21445502210 has 96 divisors (see below), whose sum is σ = 45471464640. Its totient is φ = 7218662400.

The previous prime is 21445502209. The next prime is 21445502213. The reversal of 21445502210 is 1220554412.

It is a super-2 number, since 2×21445502210² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21445502210.

It is not an unprimeable number, because it can be changed into a prime (21445502213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1933661 + ... + 1944719.

It is an arithmetic number, because the mean of its divisors is an integer number (473661090).

Almost surely, 2^21445502210 is an apocalyptic number.

21445502210 is an abundant number, since it is smaller than the sum of its proper divisors (24025962430).

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

21445502210 is a wasteful number, since it uses less digits than its factorization.

21445502210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11172 (or 11155 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The spelling of 21445502210 in words is "twenty-one billion, four hundred forty-five million, five hundred two thousand, two hundred ten".