21886065374448 has 80 divisors (see below), whose sum is σ = 61679562183936. Its totient is φ = 6632071057920.

The previous prime is 21886065374441. The next prime is 21886065374461. The reversal of 21886065374448 is 84447356068812.

It is a super-2 number, since 2×21886065374448² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21886065374441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73209565 + ... + 73507907.

Almost surely, 2^{21886065374448} is an apocalyptic number.

It is an amenable number.

21886065374448 is an abundant number, since it is smaller than the sum of its proper divisors (39793496809488).

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

21886065374448 is a wasteful number, since it uses less digits than its factorization.

21886065374448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437302 (or 437296 counting only the distinct ones).

The product of its (nonzero) digits is 247726080, while the sum is 66.

The spelling of 21886065374448 in words is "twenty-one trillion, eight hundred eighty-six billion, sixty-five million, three hundred seventy-four thousand, four hundred forty-eight".