21327435260 has 12 divisors (see below), whose sum is σ = 44787614088. Its totient is φ = 8530974096.

The previous prime is 21327435251. The next prime is 21327435263. The reversal of 21327435260 is 6253472312.

It is a self number, because there is not a number n which added to its sum of digits gives 21327435260.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21327435263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533185862 + ... + 533185901.

It is an arithmetic number, because the mean of its divisors is an integer number (3732301174).

Almost surely, 2^21327435260 is an apocalyptic number.

21327435260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21327435260 is an abundant number, since it is smaller than the sum of its proper divisors (23460178828).

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

21327435260 is a wasteful number, since it uses less digits than its factorization.

21327435260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066371772 (or 1066371770 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

The spelling of 21327435260 in words is "twenty-one billion, three hundred twenty-seven million, four hundred thirty-five thousand, two hundred sixty".