21334432260 has 48 divisors (see below), whose sum is σ = 59749200000. Its totient is φ = 5687963904.

The previous prime is 21334432243. The next prime is 21334432267. The reversal of 21334432260 is 6223443312.

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

It is not an unprimeable number, because it can be changed into a prime (21334432267) 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, 264376 + ... + 335504.

It is an arithmetic number, because the mean of its divisors is an integer number (1244775000).

Almost surely, 2^21334432260 is an apocalyptic number.

21334432260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21334432260 is an abundant number, since it is smaller than the sum of its proper divisors (38414767740).

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

21334432260 is a wasteful number, since it uses less digits than its factorization.

21334432260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76140 (or 76138 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 21334432260 its reverse (6223443312), we get a palindrome (27557875572).

The spelling of 21334432260 in words is "twenty-one billion, three hundred thirty-four million, four hundred thirty-two thousand, two hundred sixty".