21286196328 has 32 divisors (see below), whose sum is σ = 53229332160. Its totient is φ = 7093553280.

The previous prime is 21286196293. The next prime is 21286196329. The reversal of 21286196328 is 82369168212.

It is a super-2 number, since 2×21286196328² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21286196329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19525 + ... + 207252.

It is an arithmetic number, because the mean of its divisors is an integer number (1663416630).

Almost surely, 2^21286196328 is an apocalyptic number.

It is an amenable number.

21286196328 is an abundant number, since it is smaller than the sum of its proper divisors (31943135832).

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

21286196328 is a wasteful number, since it uses less digits than its factorization.

21286196328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230697 (or 230693 counting only the distinct ones).

The product of its digits is 497664, while the sum is 48.

The spelling of 21286196328 in words is "twenty-one billion, two hundred eighty-six million, one hundred ninety-six thousand, three hundred twenty-eight".