21301031260 has 48 divisors (see below), whose sum is σ = 46106809056. Its totient is φ = 8261471232.

The previous prime is 21301031243. The next prime is 21301031267. The reversal of 21301031260 is 6213010312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301031267) 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, 27424 + ... + 208216.

It is an arithmetic number, because the mean of its divisors is an integer number (960558522).

Almost surely, 2^21301031260 is an apocalyptic number.

21301031260 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 21301031260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23053404528).

21301031260 is an abundant number, since it is smaller than the sum of its proper divisors (24805777796).

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

21301031260 is a wasteful number, since it uses less digits than its factorization.

21301031260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180982 (or 180980 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21301031260 its reverse (6213010312), we get a palindrome (27514041572).

The spelling of 21301031260 in words is "twenty-one billion, three hundred one million, thirty-one thousand, two hundred sixty".