21626344362612 has 96 divisors (see below), whose sum is σ = 55684039711104. Its totient is φ = 6478033408000.

The previous prime is 21626344362593. The next prime is 21626344362629.

21626344362612 is nontrivially palindromic in base 10.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6911308 + ... + 9540380.

It is an arithmetic number, because the mean of its divisors is an integer number (580042080324).

Almost surely, 2^{21626344362612} is an apocalyptic number.

21626344362612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21626344362612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27842019855552).

21626344362612 is an abundant number, since it is smaller than the sum of its proper divisors (34057695348492).

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

21626344362612 is a wasteful number, since it uses less digits than its factorization.

21626344362612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629809 (or 2629807 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 48.

The spelling of 21626344362612 in words is "twenty-one trillion, six hundred twenty-six billion, three hundred forty-four million, three hundred sixty-two thousand, six hundred twelve".