21343612260 has 72 divisors (see below), whose sum is σ = 60792794496. Its totient is φ = 5595106880.

The previous prime is 21343612211. The next prime is 21343612271. The reversal of 21343612260 is 6221634312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157765 + ... + 259955.

It is an arithmetic number, because the mean of its divisors is an integer number (844344368).

Almost surely, 2^21343612260 is an apocalyptic number.

21343612260 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 21343612260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30396397248).

21343612260 is an abundant number, since it is smaller than the sum of its proper divisors (39449182236).

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

21343612260 is a wasteful number, since it uses less digits than its factorization.

21343612260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102321 (or 102260 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The spelling of 21343612260 in words is "twenty-one billion, three hundred forty-three million, six hundred twelve thousand, two hundred sixty".