21383682732 has 36 divisors (see below), whose sum is σ = 54061320040. Its totient is φ = 7126823232.

The previous prime is 21383682709. The next prime is 21383682767. The reversal of 21383682732 is 23728638312.

21383682732 is a `hidden beast` number, since 2 + 13 + 8 + 368 + 273 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×21383682732³ (a number of 32 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219744 + ... + 301752.

Almost surely, 2^21383682732 is an apocalyptic number.

It is an amenable number.

21383682732 is an abundant number, since it is smaller than the sum of its proper divisors (32677637308).

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

21383682732 is a wasteful number, since it uses less digits than its factorization.

21383682732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89262 (or 89257 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The spelling of 21383682732 in words is "twenty-one billion, three hundred eighty-three million, six hundred eighty-two thousand, seven hundred thirty-two".