21323540260 has 48 divisors (see below), whose sum is σ = 49399217280. Its totient is φ = 7666883840.

The previous prime is 21323540257. The next prime is 21323540299. The reversal of 21323540260 is 6204532312.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 524944 + ... + 564103.

It is an arithmetic number, because the mean of its divisors is an integer number (1029150360).

Almost surely, 2^21323540260 is an apocalyptic number.

21323540260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21323540260 is an abundant number, since it is smaller than the sum of its proper divisors (28075677020).

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

21323540260 is a wasteful number, since it uses less digits than its factorization.

21323540260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089156 (or 1089154 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The spelling of 21323540260 in words is "twenty-one billion, three hundred twenty-three million, five hundred forty thousand, two hundred sixty".