21344626000 has 80 divisors (see below), whose sum is σ = 51729956928. Its totient is φ = 8518224000.

The previous prime is 21344625959. The next prime is 21344626003. The reversal of 21344626000 is 62644312.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 21344626000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344626003) 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, 873955 + ... + 898045.

Almost surely, 2^21344626000 is an apocalyptic number.

21344626000 is a gapful number since it is divisible by the number (20) 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 21344626000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25864978464).

21344626000 is an abundant number, since it is smaller than the sum of its proper divisors (30385330928).

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

21344626000 is a wasteful number, since it uses less digits than its factorization.

21344626000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24557 (or 24541 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The spelling of 21344626000 in words is "twenty-one billion, three hundred forty-four million, six hundred twenty-six thousand".