21626546365140 has 96 divisors (see below), whose sum is σ = 61347289006080. Its totient is φ = 5691702850176.

The previous prime is 21626546365129. The next prime is 21626546365153. The reversal of 21626546365140 is 4156364562612.

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, 2570221 + ... + 7061099.

It is an arithmetic number, because the mean of its divisors is an integer number (639034260480).

Almost surely, 2^{21626546365140} is an apocalyptic number.

21626546365140 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 21626546365140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30673644503040).

21626546365140 is an abundant number, since it is smaller than the sum of its proper divisors (39720742640940).

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

21626546365140 is a wasteful number, since it uses less digits than its factorization.

21626546365140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491941 (or 4491939 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 51.

The spelling of 21626546365140 in words is "twenty-one trillion, six hundred twenty-six billion, five hundred forty-six million, three hundred sixty-five thousand, one hundred forty".